The sister-in-law's ambiguous relationship

page views:1 Publication date:2023-04-03

I'm 28 years old and have been working for 5 years. I just got married this year; my wife is my girlfriend whom I've been living with for 5 years. She's 1.60 meters tall, has really good skin, and is quite voluptuous—I'd say a D cup, but I can't quite wrap my hand around her. She's very passionate during sex and tries her best to satisfy all my needs.
Logically, I should be quite satisfied, but only I know that I've grown tired of her in bed. Perhaps everyone feels this way after being together for a long time. Spending five years together with a woman in your youth, you probably know each other better than your parents do.
So now I'm afraid to have sex with my wife. It's not that I'm impotent, but I don't have the desire anymore, and it's always very short; I can feel like I'm just going through the motions. But my desires are only getting stronger. I download all sorts of pornographic films and secretly filmed videos online… One day last summer, my wife suddenly said to me, "My sister is graduating with her master's degree this year and wants to come to our city to work. What do you think?"
What opinion could I possibly have? This is none of my business. So I said, "Come on, come on! It's good that you two sisters stay here. It'll be convenient for your parents to come in the future, haha." My wife said, "That's what we were thinking too. It's just that she'll have to stay here temporarily. There are so many bad people out there. She's new here and doesn't know anyone. I'm worried something might happen. She's so old and doesn't even have a boyfriend, sigh!" I thought to myself, we have enough rooms in our house, and it'll be fine for her. If I'm not home, they can look after each other. So I readily agreed.
That night, my wife was very happy and took my penis in her mouth, giving me pleasure for over an hour. Usually, this kind of treatment only happens when my wife wants it. Haha, I'm starting to look forward to my sister-in-law's arrival!
I actually met this sister-in-law a few years ago. She had just been admitted to graduate school and came to our city to take the exam. She stayed for only two days, and I went to the train station to pick her up and take her home.
My sister-in-law is about the same height as my wife, with excellent skin. What's most alluring is her innocent face; she speaks softly, has a shy smile, and is quite chubby. I love this kind of loli-like girl, like a character from a Japanese manga. Unfortunately, her breasts aren't very large, probably only a little over an A cup, far less than my wife's. I wonder if she's grown up a bit over the years. I heard she still doesn't have a boyfriend. If she still doesn't have anyone to "nurture" her, I guess her chances of developing are slim. Hehe, I wonder if I'll ever have a chance.
One day, I came home from get off work and was greeted by a soft, gentle voice when I opened the door: "You're home? XX went to buy groceries, she'll be back soon." I looked up and, lo and behold, my sister-in-law looked pretty much as I had imagined. Her breasts were still small, but they seemed to have grown a little. I must have stared at her for a bit too long, because her face suddenly turned a little red. I quickly looked away, and just as I was about to say something, she took my bag and turned to go inside.
Evil thoughts are like a seed; if you don't water them, they might lie there quietly forever. But if you indulge them, watering and fertilizing them, they will grow strong and healthy in an instant. I never thought I would have anything to do with my sister-in-law before, but because of that little thought a few days ago, I've started paying attention to her today.
From behind, her shoulders were narrow and sculpted, flowing smoothly down her slender waist, so delicate it could be encircled with one hand. Her round, perfectly sized buttocks were incredibly alluring—delicious! But how could I possibly live like this, seeing her every day? *Evil grin*... Days passed by like this. I'd long since gotten used to going straight home after get off work, cooking, chatting, and laughing with my wife and sister-in-law. Every time I came back from a trip, I'd bring two gifts—you know, goodwill takes time to cultivate, right? But so much time had passed, and there was still no real progress. This was making me incredibly anxious. No, I had to find a way quickly. Even if it didn't work out, I had to at least test the waters first.
There's only one computer at home, and my sister-in-law is a total internet addict; she spends almost all her free time online. My wife and I aren't that interested, so the computer basically belongs to her alone. To make it easier for her to access the internet, I put the computer next to the bed, so that whenever she wants to use the internet, she has to come to our room. After careful planning, I started implementing it.
My sister-in-law sat down on the edge of the bed right on time and started looking up cosmetics. I said to my wife, "Honey, my sister's hogging the computer, what are we going to do?" My wife was probably bored too, so she said, "What do you suggest?" I said, "Let's play Connect Four." So we set up the pieces and started. I kept adjusting my position, trying to get closer to my sister-in-law who was sitting on the edge of the bed. Because I was nervous and couldn't get close in one go, I adjusted my movements quite frequently.
My wife said, "Why are you moving around so much?" I explained, "Nonsense, aren't you tired of lying there? I can't stand it, my arms are numb. Hurry up and get off, you're about to lose again, haha." I kept making excuses like this, and beforehand I shook the blankets off. Using the blankets as cover, I gradually touched my sister-in-law's waist and hips with my feet.
My eyes were glued to the chessboard, while my instep lightly brushed against my target's waist and hips. I was so nervous! I bet many of you fellow chess enthusiasts have had similar experiences, like the first time you peeked at a girl's underwear, the first time you groped her breasts… that's the feeling. My heart was pounding, and my hands couldn't stop; I couldn't let my wife notice.
I rubbed against her a few times, but my sister-in-law didn't react much. I started to wonder, was it because I wasn't using enough force and she wasn't feeling anything? Or was she too engrossed in her internet? Well, I'll continue testing her limits. I started moving my instep from her waist and hips towards the outside of her thigh.
Because it was quite hot, my sister-in-law was only wearing thermal underwear, and I could clearly feel the outline of her underwear on my feet. I could feel her body temperature and the softness of her skin. Under these unusual circumstances, my senses were exceptionally sensitive, and I could clearly see every inch of her beauty.
For me, the most memorable part of a man's entire sexual maturity period shouldn't be the deep intimacy he experiences with women. While eye-to-eye communication, physical intimacy, and the exchange of bodily fluids may initially possess a captivating allure, making them irresistible, the most memorable aspect is undoubtedly the physical intimacy.
But as time goes by, and as a man's physical strength declines, these feelings will likely fade, perhaps even becoming something some people find terrifying. However, what won't fade with time is the feeling of each heartbeat, the forbidden pleasure and excitement of that first experience. No matter how many years later, if you can still recall that feeling, your heart will surely pound just as it did then, and blood will slowly rush to your face… My sister-in-law still didn't move, which surprised me greatly. Was she addicted to the internet or deliberately indulging me? Perhaps this virgin, who had never even had a boyfriend, had no idea what the current situation meant? I was confused, but my feet continued to gently rub together.
A mix of joy and confusion accompanied me throughout the night. After the first attempt, whatever my sister-in-law's reasons, the result was the most important thing—she didn't stop me. So, in the following days, I began to gently touch her body with my hands.
Of course, I had to be careful not to let my wife see. She's an experienced woman; if she found out, it would be a disaster. I had to be extremely cautious. During the subsequent touching, my sister-in-law probably sensed something was off, but maybe it was just a tickle or something. She would shift slightly, but her body would immediately return to its original position. This amused me immensely, so I went even further.
我慢慢的把手掌张开，轻轻的覆蓋在大姨子的半边香臀上，慢慢的靠向她的大腿外侧，用整个手掌不断地摩挲她的肉体。隔着秋裤，我能感觉到她的体温和柔软，她难道一点也感觉不到吗？她的态度代表着什么？这个问题让我久久不能入眠。
后来的某天晚上，我加班回来的晚了，老婆都洗漱过准备睡觉了。可大姨子依然在电脑前忙碌著，原来单位给她布置了一个任务，可她却没有头绪，我就在旁边帮她参谋一下，但是看来是要熬到深夜了。
老婆实在困的不行了，就跟我说：“你帮咱姐弄吧，我先睡去了。”今天我本来是一点念头也没动的，可是想不到这么大一个馅饼儿突然砸我脑袋上了。正所谓，有心栽花花不成，无心插柳柳成荫啊。
我连忙义正言辞的答应，保证完成任务。老婆走后，我开始肆无忌惮的打量著大姨子，她已经换了睡衣了，由于衣服宽松，不知道里边的情况，但是我的心开始蠢蠢欲动了，因为我知道大姨子这个时候通常是不戴胸罩的。具体如何，还得一会儿亲自观察啊，嘿嘿。
我一边帮大姨子提出一些意见，一边用整个身体开始有计划的向她靠近，肢体不断地进行边缘性摩擦。哇，太爽了，以前光用手轻轻碰触跟今天的整体平面接触的感觉真是天差地别啊。
当我整个身体虚虚的笼罩住她的整个背部时，我的胸膛轻轻的接触著大姨子的整个后背，她的体温隔着衣服缓缓的流进我的身体时我差点忍不住舒服的发出声来，我强忍住把她一把搂紧怀里的冲动，咬著牙往后撤了一些，可是不知不觉中，我的小弟弟已经立正了。我感觉到一团火已经熊熊的燃烧起来了，不管了，今天无论如何都要上一个新台阶。
我的手慢慢的靠近她的腋下，由于她俩手都放在键盘上，所以腋下没有一丝的阻挡。手碰到睡衣的一瞬间，我的手颤抖了一下，稳住，千万不能激动。
我的喉头咕咚的一下咽了一口口水，嘴里有点发干，心跳的也非常疯狂，心跳甚至带动着我整个身体都在跳动，我额头上的头发都随着心跳在一下一下的摆动。
手继续前进，前进，终于，指尖瞬间碰触到了一抹揉腻，可还没等我来得及品味的时候，只看大姨子突然抖了一下。我的脑中顿时一片空白，心说：“完了完了，这下她该生气了吧。千万别大喊，让老婆知道了我还不废了啊。”我当时那个后悔啊，“哎，手真他妈的欠，你说你就缺这一点吗，老婆的那么大你想摸不就摸到了吗，在这里废这个劲干嘛！”我正在胡思乱想呢，可大姨子继续在写东西，没什么后续动作。我感觉我瞬间又复活了，心里瞬间的大起大落让我有点莫名的兴奋。我从侧面偷偷的打量著大姨子，发现她脸上没什么变化哈哈，没事儿！这个发现让我欣喜若狂。
那既然这样，老夫就不客气了，我感觉有点意气风发，前方无论出现多大困难都难不住我了似的。我的手马上回到原位，但是没有再直接去接触她的乳房，我又开始耐心的一毫米一毫米的靠过去。手终于又接触到了，我感觉她又抖了一下，但是这次抖的很轻，我想，有门儿！
得到了提示，我变的大胆了很多，我的手掌轻轻的覆蓋到大姨子的乳房下边缘，啊，真爽啊，软软的，温温的，关键是这种感觉太刺激了。大姨子可能有点受不了，身体慌忙的往后错了一下，撞入了我的怀中，这下吓得我也不轻马上清醒了不少。有点冒进了，还没完全试验好是否真的安全，看来还得收敛点儿。
我看大姨子快写完了，我的心也越来越急，我希望她永远这么写下去，可是显然不可能了。我一咬牙，豁出去了，反正摸她已经被她知道，一不做二不休。
我把手掌虚空笼罩着她整个乳房，然后慢慢的靠近过去，突然，掌心首先碰到了衣服，而且还有一种硬硬的感觉，我瞬间的疑惑后马上清醒。
哈，碰到豆豆了。先前的犹豫，害怕等等情绪一下不见了，我的手掌坚定的罩了上去，我的手整个托住了她的乳房下半部分，指头托著上面，食指的指肚准确无误的按到了乳珠上乳房盈盈一握，刚好被我一手掌握，乳珠硬硬的，我拿指头刮了一下，她的身体剧烈的跳了一下，就这一下引的我狼性大发，另外一只手也迅速的圈了过来，强硬的握住了另一只酥乳。
她已经呆住了，除了身体的本能引发的震动外，她好像已经不能思考了。时间可能只过了一瞬间，可是我们俩个好像已经过了很久，正在整个时候，老婆的声音在隔壁响起了：“还没弄完吗，赶紧睡觉了。”听到话声，我们俩都突然一震，又迅速的分开，大姨子赶紧收拾东西，嘴里说：“好了，我自己弄吧，赶紧睡觉去吧。”我这个时候，有点尴尬，不知道怎么接口，只能僵硬的点点头，去那个房间了。
老婆的呼吸声均匀的响起了，她已经睡着了。可我的眼睛在黑夜中还是睁得的大大的，我睡不着，一直在回味着掌心的温柔，更多的却是疑惑于大姨子的暧昧态度。她今天是没反应过来还是被挑起了春情？她到底会不会怪我呢，老婆会不会知道呢？我到底该怎么著，事情还继续往下发展吗？人的贪欲是永远不会满足的，我期望着更多的收获，但是我更怕舟覆人忘。
机会很快就来了，老婆单位组织星期天去旅游。哈哈，老婆会有一个晚上不在家，真是天助我也。我早早的就开始筹划了，想好每一个细节，保证务必万无一失。
周五下午，老婆她们出发了，我下班后急匆匆的回到了家中。过了一会儿，大姨子回来了，老婆旅游地额事儿她也早知道了，所以并没有表现的反常。
她问我晚上想吃什么，吃什么她去做。这哪能啊，我就连忙说，都上了一天班了，都累呼呼的，甭做了，今天晚上我请你吃好吃的。
大姨子欣然同意，她也有点懒哦。哈哈，入我毂也！
我们吃的烧烤，我估计多点了几瓶啤酒。
大姨子问：“你喝得了那么多啊？”我说：“你不喝吗？你这都工作了，应该锻炼锻炼了。”我说的让她有点心动，她还得意的对我说：“其实我能喝着呢，我们同学聚会的时候，我自己喝了一瓶多呢。”我心里嘿嘿笑了一声，心想就怕你不喝，嘴里却说著：“你自己可估计著量啊，别喝多了，别一会醉了回不了家，我还得背你走，虽说是亲戚，可毕竟男女授受不亲嘛，小心我占你便宜哈。”大姨子脸红红的，羞涩的笑了一下，没吭声。
就这样我们边吃边聊著，我个人比较能说，而且又是提前计划好的，所以话题一直没断，她也一直兴致勃勃的讲着她学校中的事情。
酒慢慢的少了，不过她也就喝了不到一瓶，说什么也不再喝了，剩下的我只好都灌我肚子里了。
我见气氛冷下来，于是适时的马上提出回家。作为一个有理想、有知识、有手段的色狼，察言观色是必不可少的，切记。
回到家后已经快十点了。估计酒劲上来了，大姨子洗漱后很快就睡觉了。我静静地坐在电脑前，无聊的浏览著网页，心里也在不断盘算着我的计划。我看时间还早，这会儿去实施我的计划有点太早，于是我也躺在床上养精蓄锐。
迷迷糊糊中，我睁开了眼，也不知道几点钟了，突然想起隔壁还有个睡美人呢，我一下子睡意全消。
想起我的那个计划，我顿时感到一阵兽血沸腾，再也躺不住了，于是我轻轻的起身，蹑手蹑脚的来到另一个房间门前。
我的手慢慢的握到把手上，然后轻轻的旋转，咯吱咯吱的响声在夜晚凸显的如此刺耳，我不得不停下来观察一下屋里的动静。确认没事后，我打开了门走了进去，屋里漆黑一片，唯一的光源就是从窗帘逢儿里漏出的一点点光线，我的心怦怦的跳着，大气也不敢出一声，我站在门口慢慢的平复紧张的心情。
终于挪到了床边，我仿佛已经闻到了大姨子的体香，我蹲在床边仔细的打量着她的睡姿。我早就听老婆说，大姨子睡觉极其稳，几乎是雷打不动。刚才就算我再小心，可是弄出来的声音还是不少，可大姨子一点反应也没有，看来是名不虚传啊，嘿嘿。
现在从哪下手呢，我突然不知道该干什么了。大姨子稍微侧着点身，一只胳膊搭在胸前，正好把右边的乳房挤的高高的，睡衣的两个扣子之间也被挤开了，露出了一片白腻的胸肌。
我的手颤悠悠的伸向了那片高耸之地。时间极长又好像极短，我的指尖终于碰到了，凉凉的，软软的，巨大的满足感瞬间袭遍全身，我的喉咙艰涩的咽下一口口水。
我的手指柔柔的在乳房上滑动，我既怕把大姨子弄痒了醒过来，但是又舍不得这种舒服的感觉。乳头被睡衣包著，我直接触摸不到，但是透过屋里的微光，我好像看到乳头已经突起了，这个发现让我愈发的不可自制，我做出了一个大胆的举动。
我的嘴慢慢的向那颗红豆靠近过去，我的舌头已经贴在那个突起上，但是触感全是衣服的，于是我用口水浸湿了乳头附近，轻轻的舔弄起来。
我正爽着呢，突然大姨子哼了一声，吓得我速度蹲下去。
心里想：“坏了，坏了，这下肯定玩完儿啦，一会儿我怎么解释呢？”就这一小会儿，我心里千思百转，吓得我出了一头的汗。
可是等了一会儿，也没出现想像中的那种情况，偷偷的抬头一看，发现大姨子只不过是翻了一下身，又睡过去了。我的心一下子就从嗓子眼掉进了肚里。妈的，这勾当可不是一般人能玩的，心脏不好的绝对死这里了。
经过这么一闹，我也不敢再撩拨胸部了。我一打量，发现她翻身后，现在已经是呈大字型仰躺着了，腿上的睡裙也撩起来一大块。
鬼迷心窍之下，我又挪到了床尾，这下离的大姨子头部远了，动作也不需要像刚才那么小心翼翼了。
我的眼睛正对着那片三角地带，口水一口一口的咽著。动还是不动呢？他妈的，都到这个份上了，拼了！我的手轻轻的掂起了睡裙的一个边，一点一点往上撩。
终于整个三角地带都露出来了，在白色的内裤边缘还有几根探头探脑的黑色毛发在向我招手，啊，真是太刺激了。
在这个黑暗的环境里，在紧张的心情里做着禁忌的事情，我的下腹部突然一紧，小弟弟猛的向上一扬，呵呵，差点走火。这下比刚才那下还让我紧张，要是走火了，今天就他妈的白搭了，还玩儿个屁啊。我急忙坐在地板上，紧紧的捏著小弟的根部，慢慢的等激动地心情平复。
我正在天人交战呢，突然好像听见大姨子断断续续并且有点压抑的呼吸声，我一下子定住了，因为我估计大姨子这会儿十有八九是醒了，接下来应该是雷霆般的爆发吧，应该是我尴尬欲死的时刻了。
我认命了，我坐在地板上索性不动了，既来之则安之吧。
一分钟过去了，可是我感觉好像过了一个月般的漫长，诶？咋还没动静呢？
难道……我想到了一个可能，那是我最期望发生的事情，想到这我眼前一片光明，脑子也慢慢的活络起来。
一不做二不休，我把手坚定的伸了过去，反正她都知道了，生死由命吧。
我的手又碰到了一片柔滑，她的腿反射性的抽了一下，但是没有蜷缩回去。
哈哈，我几乎要兴奋地出声了，她没有直接起来拒绝我，这意味着什么显而易见了。
心情大好之下，我的手更加坚定放肆了，看来大姨子的情欲被我挑起来了，我得再接再厉啊。一想到梦寐以求的可口美味即将被我吃掉，我就浑身燥热。
不能着急，现在还不安全，得全面挑起她的性欲，让她欲罢不能。
我的手顺着她的小腿温柔又不乏力度的往上滑过去，我全身心的感受着每一寸的柔滑。
我随着手的方向，慢慢的爬在了大姨子的身边，闻着她的体香我长长的舒了一口气，他妈的，终于得偿所愿啊。
跳过了三角地带，我的手坚定的从睡衣下摆伸了进去落在了柔软的小腹上。
大姨子的呼吸随着我的动作越来越急促了，我的手不断地在她的小腹上画著圈。
突然，我一下子把手盖在整个乳房上，手掌发力紧紧的握住了那团酥肉。
大姨子就如同青蛙一般，整个身体猛的跳动了一下，再也压抑不住的呻吟冲出了喉咙。
她的眉头紧紧的皱在一起，一只手背紧紧的按在嘴边，另一只手死死地抓着床单，不时的抓捏著，双腿也紧紧的绞在一起不时的蠕动着。
这样的娇态与老婆是何其的相似啊，一想到老婆，我心中的那股邪火就更加的旺盛，手活动的也就更加的狂野。
我的两只手快速的把大姨子的睡衣扣子解开，她徒劳的试图阻止。我坚定的握住她的两只手固定在她的脑袋两边，然后完成我未完的工作。
我整个人跨坐在大姨子的小腹和三角地带上，缓缓的抓住了睡衣的两襟，我死死的盯着她的脸，她的表情似痛苦，似期待，牙齿紧紧的咬著下唇，从唇齿间不时的漏出几声娇柔无力的呻吟。
我猛地一下把睡衣向两边撕开，整个胸乳瞬间暴露在我的眼前。大姨子一下子睁开了双眼，无论眼中是什么样的表情，但是里面的春情和水意是怎么也遮盖不住的。
我邪邪的对她笑了一下，说：“姐，我喜欢你，我早就想这样了。你放心，只要你不说，我是不会告诉ｘｘ（我老婆）的。我知道你偷偷的看过我电脑上的ａ片，你肯定对这种事很好奇，今天我会好好地教你的，你说行吗？”我话还没说完，她就把脑袋转到一边了。我知道这种情况是不需要女方说话的，我的手又回到了两个乳房上。
她的乳房不大，但是非常的柔软滑腻，让我爱不释手，我的嘴也含了上去，不时的用舌头挑逗著两个乳头。她越压抑自己的呻吟，我就越加的卖力，我们开始了角力。
我的舌头顺着双乳慢慢的滑到了小腹上，稍作停留就来到她的大腿根部。
我温柔的舔弄著，不时的用手指勾起内裤的边边，若有若无的骚扰着她的军事重地。
她的两腿一抖一抖的，不时的绞弄在一起，似逃避，似逢迎的和我的舌头不断地接触著。
我拽着她的内裤轻轻的帮她脱了下来，啊，最重要的地方终于暴露在我的眼前。
她的嘴里发出了犹如哭泣般的呻吟，但是并没有阻止我的动作。她的毛发不太多，全部柔顺的贴在趾骨上，我的双手轻轻的掰开她的肉唇，露出那一个粉红的小突起。
我的舌头轻柔的不能再轻柔的舔著豆豆的周围，努力不碰那颗敏感的豆豆。
她的呻吟声控制不住了，床单被她抓的咯吱咯吱直响。我的嘴沿着两片肉唇上下的舔著，我的鼻尖不时的碰触豆豆的部位。她的花谷现在就如同雨后的乡间小路，泥泞不堪了。
看着她娇柔多姿的身态，我的黑暗欲望越加的膨胀。
我决定不能匆匆的占有她，我要再好好地玩儿一会儿。
我右手的中指划开了两片肉唇，来到了水帘洞口，在沾满了她的淫水儿后，慢慢的插了进去。
小屄反应很强烈，毕竟是第一次遭到外来的侵略。但是我的耐心很足，在我不懈的活动下，小屄渐渐的放松了。
我手心向着趾骨，四指蜷缩，只留中指在洞口处，沿着花径的上方慢慢的滑进去，我紧紧的盯着大姨子，观察着她的反应。
她微张著嘴，呼吸好像停止了，她应该在感觉我手指的动作。手指滑进了两节了，差不多就是这个地方了，我的指肚开始在那块揉起来。只听她突然大声的喘起来，身体也开始向上一拱一拱的。
哈哈，看来是找对地方了，那块开始变的粗糙起来，一个一个得小颗粒也突了起来，我更加的卖力了。
她这会儿已经完全没有了当时的矜持和挣扎，她现在只会跟着我的手指上下挺动了。
我的手指越来越用力，动作越来越快，终于，我的手指感受到了一阵一阵的紧缩，她在我的手指上迎来了第一次的ｇ点高潮，看着她迷醉的表情，我感到前所未有的成就感。
我跨坐在她的胸前，坐在两个乳房上，硬硬的乳头硌着我的ｐｐ痒痒的。
我把已经勃起的如同一根铁棒的鸡巴放在了她的嘴边，说：“张开嘴把它含进去……用嘴唇不要用牙齿……对，再用舌头轻轻的舔……好的，多弄点口水上去……”啊，我已经舒服的不知道身在何处了，只感觉宝贝上有一阵阵的热气在升腾著。
大姨子好像完全沉浸其中了，眼睛半睁著，嘴巴在认真而又生疏的动作著。
Seeing her expression, I couldn't hold back any longer. I slid my entire body between her legs, positioning the head of my penis at her entrance. I looked at my sister-in-law and said, "Don't be afraid, I'll make you feel good." I slowly lowered myself. Her vaginal canal was already well-lubricated, so it wasn't dry. My fifteen-centimeter-long penis slid in section by section. Ah, it seems like there's no resistance at all. Although my sister-in-law occasionally cried out in pain, she didn't seem particularly uncomfortable. Never mind, this is even better; I can have my pleasure right away.
I felt like there was still a little bit left, so I put it all in at once.
My sister-in-law suddenly screamed, "Ah, it hurts!" She hugged my back tightly with both hands, and I didn't dare to move. After a while, seeing that she had calmed down, I started to slowly move my penis. This time, my sister-in-law didn't say it hurt, so I was completely relieved.
My wife and I, who hadn't used this technique in a long time, used it in various ways, from left to right, from shallow to deep, drawing circles around the waist, licking the base of the ears, and so on. All sorts of tricks came out one after another. My sister-in-law's moans grew louder and louder, and the sound of rubbing and squelching became louder and louder. Because there was so much water, it completely filled the gap between my penis and her vaginal canal. Every time I pulled out my penis, it even made the sound of pulling out a cork.
The convulsions grew faster and faster, and my sister-in-law had completely lost control. I brought my mouth to her lips, and she frantically sucked on my tongue.
Using my waist as a fulcrum, I slammed my lower body into her vagina like a pendulum, thrusting violently again and again. I could feel warm droplets splashing onto my thighs from time to time, and the hair between my toes was wet and slippery.
That's insane, that's absolutely brilliant.
Seeing my sister-in-law's flushed face, I suddenly felt a tightness in my back, and my penis swelled even more. I couldn't care less about controlling my strength anymore; I quickly lifted her legs onto my shoulders, making her look as if she were folded in half. My hands braced against her breasts, my body stretched into a straight line, and then, without moving my head or feet, I thrust my hips in and out like a jackhammer, violently and rapidly. My sister-in-law was screaming almost to the point of exhaustion.
Suddenly, a surge of intense pleasure coursed through my body, and a torrent of fluid shot from my testicles onto my penis, which was now deeply inserted into her vagina. I couldn't move. My penis swelled, and semen gushed out in spurts. My sister-in-law stopped moaning; her eyes were tightly closed, her mouth was wide open, and her tongue was moving unconsciously. Her vagina was spasming.
Suddenly I felt my penis slide forward a little further, as if it had entered another, smaller, hotter, and softer passage. I was almost at the point of ejaculation, but because of this, my penis swelled and contracted rapidly several times. Hehe, it felt so good, I wanted to die. My arms could no longer support my weight, and I collapsed onto that wet, sticky body, not wanting to move at all.
My mind was blank; I was exhausted but not sleepy at all. After resting for a while, I glanced at my sister-in-law. Her eyes were closed, her mouth was half-open, and her chest was still heaving violently. I guessed she was out of strength, so I struggled to sit up. With great effort, I managed to get her into a squatting position, and casually stuffed her underwear under her vagina. I heard a gurgling sound, and then a large gush of semen gushed out of her vagina.
The next day, I went to the pharmacy early in the morning and bought emergency contraception (Yantong) to prevent any accidents. Later, during our conversation, I learned that she usually experienced a few days of heightened arousal after her period each month, and she would always masturbate. I guess her hymen probably broke sometime during that time.

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The sister-in-law's ambiguous relationship

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