Boyfriend and his sister had an ambiguous sexual relationship. Author: jost555

My boyfriend and his sister had an ambiguous relationship and slept together.

Author: jost555
Posted on May 14, 2012 in a sex forum
Word count: 23811

My boyfriend and I were university classmates. Now we've both graduated. He's working, and I failed my postgraduate entrance exam interview last year,
so I just grabbed a job, which I'm not very satisfied with. With the end of the year approaching, I'm planning to quit. I'll be resting at home starting in January.

Let me tell you about my situation.

I'm 169cm tall and weigh 105kg. I'm fairly fair-skinned, not a stunning beauty, but fair skin does cover up some flaws.

I still get a lot of attention on the street.

We currently live in a studio apartment, which originally belonged to my boyfriend's aunt. Later, his aunt and uncle moved to
a faraway city and stopped living there. Since it's family, they sold it cheaply. We're grateful to his aunt for providing us with a place to live during this time of
soaring prices and exorbitant housing costs. Although it's a bit old, we're very happy!

My boyfriend's parents divorced when he was in elementary school. According to him, it was because his father cheated on his mother
… but! His dad remarried, but his new wife isn't the one he cheated on him with! We younger family members won't comment
… This is the girl my boyfriend's current stepmother brought over. I should mention that my boyfriend and I started dating in our sophomore year of college
, and it's been over three years now. His dad remarried two years ago, and I even attended the wedding. I quite liked this
girl ; she was pretty, petite, not very talkative, and liked to laugh.
There were a lot of relatives visiting, and not enough beds, so I shared a small bed with her. Since I'm only a year older than her, we
had a lot to talk about, and we got along quite well!

Speaking of which, she's a year younger than us, graduating next year; she's a senior this year. I heard she's not a particularly diligent
student , attending a less prestigious university in a less desirable major, making it difficult to find a job. But she's quite
ambitious and insists on working in the provincial capital. So, starting in October when her classes were almost over, she moved in
with my boyfriend and me. I was very happy about it! I'm a very restless person. My boyfriend usually works overtime,
while my job is relatively easy; I get off work at 5:30 and basically have nothing to do... So I thought,
it would be great if my sister came over so we could play and talk together. So when my boyfriend's parents called about this, I
kept saying, "Don't worry, don't worry, leave it to us. We'll definitely find you a good job.

" So, one weekend, my boyfriend went to the small town where my sister goes to university and picked her up.
There were so many things with her; it was like moving house. My boyfriend and I spent an entire night unpacking her and setting up
a bed in the living room. I was worried that she might need privacy, so I went out and bought a large curtain to hang next to the bed so
she could do whatever she wanted inside. I'm such a good sister-in-law, la la la~

While we were doing all this, my sister took a white radish and started munching on it. She ate two, and I noticed
her licking the radish occasionally. She noticed me watching her eat like that and said it tasted even better that way. I smiled.

Her action reminded me of what I do when I help my boyfriend. I felt a little wet down there.
I needed to clean myself up quickly, how embarrassing! We had to go to work tomorrow. It was almost 1 a.m., so everyone washed up and went to bed.

Not long after we got into bed, I heard his sister's soft snoring. I couldn't fall asleep for a long time, and my boyfriend couldn't
sleep either. I held his penis and said, "Did you see your sister eat radish just now?" He said, "Huh?

No!"

But my hand started stroking it up and down. I whispered in my boyfriend's ear, "The way she ate the radish
reminded me of your little brother. I really wanted to take a bite then." My boyfriend's penis gradually became erect. My boyfriend isn't very
strong , but his penis is alright, with 16cm testicles that are especially big. I love sucking on his penis and watching him enjoy it.

Then my boyfriend pressed my head down onto his penis, and I didn't hesitate to take his open glans into my mouth and
suck on it. My boyfriend's hand was also teasing my clitoris. I consider myself quite skilled at oral sex; his glans was constantly
leaking clear fluid, which I took into my mouth, then spat onto his penis, licking it, slowly moving down to
envelop one of his testicles in my mouth, then spitting it out, then switching to the other. Next, I slowly licked upwards from the base of his penis with the tip of my tongue
, then gently circled the glans with my tongue. At this point, my boyfriend let out soft moans, his fingers
thrusting in and out of my vagina, his other hand pressing down on my head, moaning: "So good...so good...!"

Then his sister got up. We both stopped. His sister got up to use the bathroom, then lay back
down . I was moving my head up and down, and my boyfriend said: "Let me fuck you!" I thought about it; if we did it, I'd have to wash up later,
and it might wake his sister, so I said: "No need today, it's too late! Tomorrow. I'll take care of
it ." Then, I sped up, my mouth on his glans, my hands stroking him incessantly. After a few minutes, my boyfriend's
moans changed; I knew he was close to climaxing. Without stopping, his penis throbbed, and a thick stream of semen
shot into my throat. I swallowed it all. My mouth remained on his penis until he finished, after which
I licked the semen clean. I looked up at my boyfriend and asked, "Was it good?" He pulled me into his arms and
said, "I'll treat you properly sometime." I kissed him and said, "Let's sleep." We fell asleep in each other's arms

. The next morning, I got up at 7:30, grabbed some bread, and started making milk. Suddenly, I remembered there was someone else at home, so
I quickly ran out to ask my sister if she wanted breakfast. I called a few times, and she said no. Well, I won't
wake her up so early anymore; let her sleep. My boyfriend gets up like he's fighting for his life every morning. Getting up five minutes earlier would kill him ! He's
so loud at home. I told him to keep it down; there are people sleeping! He kept making noise! My sister was also
woken up. She pulled the curtain shut and came out. It's still quite warm here in October, and my sister was wearing only
underwear and a t-shirt when she pulled the curtain shut! I didn't even react at first. My first thought was, "Who is this person?" My sister
wasn't wearing a bra under her clothes, and her two little breasts were pushing up her t-shirt high. Her two cute little nipples were faintly visible. I don't
know if it was because of the natural flesh under her underwear or because she had a lot of pubic hair, but there were a lot of "loose threads" around her underwear
... My boyfriend was also stunned, standing there staring blankly, completely mesmerized. I gently nudged him, and he finally
came to his senses and said, "I'm going to the bathroom..." My sister was very polite and called me "sister" t_t. Everyone was so embarrassed.
I don't know what my sister was thinking. Was she still half asleep and thought she was in the dorm?

I followed her into the bathroom and whispered behind my boyfriend, "Why are you staring like that? She's so beautiful!" My boyfriend
smiled embarrassedly and said, "It just happened so suddenly, I didn't have time to hide." I said, "Don't get any funny ideas. She's your sister."
"Sis. That's incest! Be careful, or I'll cut it off." Saying this, I grabbed his genitals, only to find he
was already erect. He smiled sheepishly. I pretended to point at his penis and scolded, "You're so restless!" I

lightly slapped it a few times. My boyfriend grabbed my hand and started stroking it up and down through his pants. I
asked, "Are you going to do it again?" "Don't you have to go to work?" My boyfriend was about to say something when suddenly a cough came from the doorway. We were startled.

There stood my sister, saying she needed to use the restroom. We were even more embarrassed and quickly moved aside. She was still
naked as she walked past us, she glanced at my boyfriend with a resentful look in her eyes. I didn't think much of it, assuming
she felt her brother shouldn't do this. But I didn't realize that her look contained a different meaning!

My boyfriend's work was farther than mine, so he grabbed my bread and ran away. I guess he couldn't handle such a steamy scene and
ran away. I thought he definitely couldn't handle it; I wondered what he would do at work. I want to say I'm a good sister-in-law!
I wanted to ask her if she had any pajamas, but I was too shy. Girls are sensitive, and she
didn't even . Would it be inappropriate for me to bring it up? So I ignored it, made a few pointless remarks, and went to work! All day long, I couldn't stop
thinking about my sister's underwear!

So, during lunch, I texted my boyfriend to ask if my sister usually did this at home.
He said no. I thought that made sense, since his dad is usually home too. For the next two days, my sister slept for two days
… I discovered she has two main hobbies: sleeping and munching on carrots! Or rather, munching and licking them!

I usually eat at the company because I'm lazy, and my boyfriend is often working overtime
or traveling, so I rarely cook at home. But with my sister here, I couldn't let her eat alone at home, could I? So
I bought groceries and cooked. I got off work early anyway, and it was a good opportunity to show off my domestic skills and make my sister-in-
law happy, hoping she'd say good things about me… I'm so traditional! ^o^

When I got home, my sister was curled up on our bed watching TV. I asked, "Are you home all day?" She said yes, and
that she didn't know anyone here. I said, "I'll take you shopping this weekend!" While I was cooking, my sister was
watching. The place is small, so we kept bumping into each other. I said, "Go watch TV, it'll be ready soon." My sister was
embarrassed and said she didn't know how to cook. All my annoyance
vanished … I happily cooked! My boyfriend came home too. During dinner, he suddenly said, "
Wear more clothes at home from now on…"

Can you believe how inconsiderate he is? Why didn't he say that then? Now so much time has passed, and everyone
is dressed neatly! Why say it now? Couldn't he have waited until later to complain? My sister gave me a look, and that little
glance… it made me uneasy. Did she think I was gossiping behind her back?

That night, my sister wasn't very talkative towards me. I noticed that she had usually gone in wearing only
her underwear, but that night she went in fully clothed! She came out fully clothed too
… I criticized my boyfriend that night, saying, "The girl didn't complain, why are you making such a fuss?" He was
so serious ! He said we weren't related by blood, it wasn't right!

Just as I lay down, my boyfriend's hands reached for my breasts, one hand playing with my nipple, the other being
sucked and licked. Soon my nipples were hard and large, and my genitals were wet.
My hands were also gripping his penis. Then he turned on the bedside lamp, saying he'd treat his wife well tonight.
I said shyly, "Be gentle, my sister's still in the living room." My boyfriend smiled lewdly, and I knew it was going to be
another sleepless night. I was so excited!

My boyfriend laid me down and carefully admired and studied my genitals. He used two thumbs to separate the labia majora and
one middle finger to tease the labia minora. At the mons pubis, I saw that little pink fleshy ball again. Ah! The clitoris is so beautiful!

So, my boyfriend stretched out a finger and gently flicked it repeatedly. "Ah!" I cried out in
surprise, my body arching upwards, trembling: "No...be gentle! I can't...I can't do this..." I
cried out nervously, both excited and afraid of waking my sister in the living room. My

boyfriend continued to caress the sensitive clitoris, and my body trembled even more violently,
writhing . I really couldn't hold back anymore, so I grabbed a pillow and bit it. Seeing my strong reaction, my boyfriend's
heroic spirit surged, and his emotions became even more excited. My boyfriend held his penis and thrust in forcefully, "plop!"
deeply penetrating my body. "Oh!" I gasped softly, my body trembling again. "...Oh
...so tight...I love it." My boyfriend was thrusting in and out in a "doggy style" position, yelling excitedly.

My vagina contracted repeatedly, suppressing my moans. He thrust violently dozens of times, and I moved
my hips in sync with his movements. "Is it good?" he asked between thrusts. "Yes!" I cried out. "Want more?"

"Yes... fuck me... oh... you're doing it so well... my whole body is tingling..." My vagina sucked on
his penis. "Ah... harder... oh... oh... ah... I'm coming!... God
... faster!

... faster..." His thrusts became even faster. My body swayed back and forth with his thrusts.

"Ah!"

I suddenly screamed, my body trembling uncontrollably. My boyfriend knew I was pregnant. He
turned to face him, and we embraced tightly, our tongues intertwining... He whispered between kisses, "Wife,
are you comfortable?" I didn't answer him, my eyes closed, and I nodded gently, letting him caress and kiss me.

After a while, my boyfriend's penis was erect again, eager to display its power once more.

He placed his penis near my lips, holding its thick, long shaft in his hand,
rubbing it against my cheek a few times. I couldn't help but lick the head of his penis with my tongue, then opened my
mouth and, with a "tsk!" sound, took it into my mouth, feeling my tongue swirling around it!
His penis grew even thicker, almost overflowing my mouth, so I quickly spat it out. Then
I gently stroked his penis with my hand, while my left hand's fingers lightly caressed
and teased the throbbing shaft. I occasionally brushed the strands of hair that fell beside my cheek, tucking them behind my ear, while simultaneously
lowering my head and licking the head of his penis with a wanton lick. My small, fragrant lips were constantly stroking the groove around his penis.

Then my boyfriend pressed my plump buttocks against his face and began to lick my wet, juicy buttocks with relish.
Her tender hole, then her tongue stretched and contracted, licked and teased, occasionally gently biting my clitoris. "Mmm...

No... Don't tease me anymore... Oh... Ah... It feels so good... You big bad guy... Ah...
I can't take it anymore ... Ah..." My mouth tightly held my boyfriend's penis, as if afraid it would slip away. She
would occasionally moan softly during the sucking pauses, to release the lust in my heart, her slender waist twisting and swaying. "Ah..."

…Baby…oh…so good…oh…ah…ah…” My tender little hole kept flowing with my
lustful fluids, soaking my boyfriend’s face. My clitoris was throbbing from his sucking. Perhaps my
sexual desire hadn’t been released yesterday, my body kept twisting and turning, moaning wildly and seductively: “Oh…oh…so good
…ah…you’re making me feel so good…ah…I can’t take it anymore…ah…I’m coming…oh…so
good ” I suddenly trembled a few times, and a stream of hot, sticky lustful fluid sprayed into my boyfriend
’s mouth. I lay weakly on the bed, savoring the passion of just now. My boyfriend came over and whispered in my ear: “
Baby, was it good?” “Mmm…” I nestled in my boyfriend’s arms and fell asleep like that…

The next day I woke up feeling radiant, and after a day of… Everything was great, even my face looked rosier.

After a few days, I noticed something was off. My sister came to look for a job, so why was she
spending all her time watching TV and surfing the internet? I asked her, and she said she was just bored at school. Her
roommates were either living with their boyfriends, going home and not coming back, or simply disappearing! Well, these days,
college students … I understand, I just graduated! Turns out, this girl was just here to have fun. She probably got bored at home and
had someone watching over her, so she found an excuse to come out. She likes to watch TV in our room. Well, there's only one
TV ; what else can she do if we don't let her watch TV? But sometimes she watches until past midnight. My boyfriend and I
only have one bed, and she lies on the other side. I felt bad about kicking her out. She uses the remote to change… After going back and forth, there was really
nothing left to watch before I left. I didn't want to rush her, so I told my boyfriend. The next day, the TV was in
the living room … Actually, I didn't think there was anything wrong with that, I just hadn't told her. My sister is only a year younger than me, I
thought she would understand, but I was wrong.

When I came back the next day, my boyfriend hadn't come home from work yet. I saw her sitting there, the lights weren't on, and asked her what was wrong.
She said, "Sister, I'm leaving tomorrow." I was confused, she hadn't mentioned this before. I asked, "Is there something going on at school?" Guess
what she said? She immediately stood up and said loudly, "Do you think I should rush you to leave?! You?!" I was
startled What did she mean? I asked, "What's wrong? What did I do?" She said, "You know yourself!" Then
she added, "Shameless!" I completely lost it! What's going on?! I immediately… Before I could even put my bag down, I was bombarded with insults
! I walked up to her and asked, "What are you talking about? I don't understand, but you need to explain yourself today." I snapped
the light on, and that's when I saw the girl's face was covered in tears! I was stunned. I'm a pushover; when I see someone
crying , my first thought is that I've bullied her? I asked, "What's wrong? Are you in a bad mood?" She said, "Nothing, just
a little annoyed." I sat down next to her and continued, "Tell me what's wrong." She said, "It's about finding a job, it's so frustrating."
So I launched into a long, rambling speech to comfort her, saying things like, "Everyone goes through this," "Things will work themselves out,"
and but she didn't seem to react much! So I said generously, "Let's go! If you're feeling down, let's go out
for a big meal!" I called my boyfriend, asked where he was, and told him I was going out to eat with her, asking him to come. She came too. My boyfriend
's reaction was strange; he asked me why I went out to eat with her. I said I wanted to

. Now I guess she must have complained to him about me that day, which is why he was surprised we
were eating together. That meal wasn't very enjoyable because I ate the most! She came to our
area at the end of October, went home for about a week in early November, and then came back, bringing a lot of food from home,
made by her mother, saying she wanted us to try it. This time she came back a bit different; her hair was done
, that kind of layered bob, dyed chocolate brown… I won't go into the mess in between, anyway, I'm not going to try
to justify it. Two girls the same age, and she even has ambiguous feelings for her brother—we just couldn't get along.

That day was November 26th. I remember it clearly, it was a Saturday.

One of my best friends from university was having an early birthday celebration. She lived in the same city, but much further away. We ate dinner
until after 11 pm, and she even suggested we go play cards. So I called my boyfriend and told him I wouldn't be going home that night,
jokingly adding, "You guys are all alone, don't let me down." That night, I played cards with my best friend
and her friends at a karaoke bar. There was my best friend's boyfriend, me, another guy, and her boyfriend's friends—four of us in total. Playing cards was really boring,
and I wasn't very motivated. My best friend suggested we play a game with a penalty. "Okay, okay!" I was practically falling asleep,
and everyone agreed. Truth or dare? Sigh, we're all adults, playing truth or dare is just a childish game.
Then my best friend suggested we take off our clothes. Whoever lost had to take off a piece of clothing. The three of them were all looking at me... I blurted out, "Come on, come on!"

But a little nervous, I thought, "I have one more layer of clothing than them!" So, the game of cards, a kind of punishment
game, began. In the first round, my best friend's boyfriend's friend lost, and he unhesitatingly took off his shirt. "Wow!" my best friend exclaimed. "
What? Your breasts are sagging?" Everyone burst into laughter. The man was fair-skinned, but had a lot of fat on his body;
he clearly didn't exercise much.

In the second round, my best friend's boyfriend lost, and he also unhesitatingly took off his shirt. "Wow..." I exclaimed.
What a physique! Six-pack abs, a dark chest, so manly! My best friend said that's how he is, and I didn't even want to look
. I didn't dare look any longer, but my heart was pounding with attraction to his physique. Then tragedy struck. I hesitated for a moment, then took off my
shirt , leaving me only in my bra. "Okay," I suddenly declared, "Let's play!
Who's afraid of who? My figure is impeccable, no flab, and my breasts are a perfect 36B." The next round
, I lost again. Ah... I hesitated. All three of them were looking at me. My best friend couldn't help but laugh
, her smile radiant. My best friend's boyfriend then said, "It's so late, let's stop playing and go home." I was conflicted. "I'll give it my all
..." I said, "Games have rules." I took off my bra and tossed it
to my best friend, revealing my two little rabbits. The two guys looked a little embarrassed and lowered their heads. They shuffled the cards. I said, "Let's continue."

I noticed my best friend's boyfriend secretly glancing at my chest while shuffling the cards, but I didn't say anything.

Before the next round was even over, I suddenly had a stomachache and rushed to the toilet; oh no!! My period started!

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Boyfriend and his sister had an ambiguous sexual relationship. Author: jost555

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