My Passionate Story with My Sister-in-Law (Family Incest Adult Fiction)

My wife Xiaohui and I met when we were in college. We are both locals, but the difference is that my family is in the city and hers is in the suburbs. We started living together in our sophomore year. Our parents seemed to know about it, but since we had a good relationship, they didn't object. So after graduation, we got married quickly at our parents' urging.

Life after marriage was very peaceful. Since I majored in orthopedics in college, I became an orthopedic doctor in the Second Municipal Hospital after graduation. My wife studied traditional Chinese medicine, and it was difficult for her to find a job, so she worked as a salesperson in a pharmacy. Her income was not high, less than one-fifth of mine. After working for a while, she found it boring and resigned. Later, she never found a suitable job, so she just stayed at home and did nothing. The year before last, we bought our own house. It’s not a big house, but our world of two is peaceful and sweet.

However, this peaceful life was disrupted with the arrival of my sister-in-law and her family.

My sister-in-law is called Xiaoru. She is two years younger than my wife. Although she is two years younger, she is actually only fourteen months younger than her sister. She looks very much like her sister. At first glance, you might think they are twins. The difference is that my wife is more lively, while Xiaoru is more quiet. Xiaoru’s husband is called Ahui, who is a very energetic man. He works as a salesperson in their company. Perhaps because he often goes out, he appears to be very tactful and capable in what he says and does. Ahui and Xiaoru's workplace is also in our city. They have been married for just over a year and have not bought a house yet. They have been renting a house. After we bought the house, my wife suggested that since we have two bedrooms and two living rooms and we don’t have any children, it would be empty anyway, so why not let them move in? It would be easier for the whole family to live together and take care of each other. I thought it made sense, so I agreed without hesitation, and Xiaoru and her husband moved in.

The small house became lively with four people living in it. Ah Hui was very talkative and often made the two sisters laugh. He and my wife got along very well because my wife is also quite lively. When we were chatting together, we saw the two of them talking. Xiaoru and I simply became their loyal listeners and listened to their nonsense about all sorts of things that day.

However, no matter how lively it is, it is still not very convenient sometimes. Because we only have one bathroom, I often get up in the morning and rush to the bathroom, but the bathroom is already being used. Xiaoru and I are relatively introverted, so when we encounter this kind of situation, we have no choice but to wait. When we come out and see that the other party is waiting to use it, we feel quite embarrassed. But my wife and Ah Hui are different. My wife is okay. She knocks on the door, meaning that the person inside should hurry up. Ah Hui was more direct. He couldn't wait any longer and shouted from outside, "Hurry up, those inside! I can't hold it any longer." When he saw his wife coming out, he teased her: No need? Wait a minute. Don’t come in when I’m using it.

Just like that, after about half a year, our lives changed completely.

That day was Saturday and my wife went back to her parents' home. Since she resigned, she often went back to her parents' home to play for two days on weekends, and I had long been used to it. Ah Hui is also on a business trip and said he will be back around Monday. Because I had to be on duty, Xiaoru was the only one at home. Xiaoru works as an accountant in a company and can rest on weekends.

At noon, I forgot something at home, so I went home to get it, but I couldn’t find it no matter how hard I looked. When I asked Xiaoru, she said she didn’t know either. I called my wife, but her phone was turned off. I had to call my father-in-law. After the call went through, I told him to let my wife answer the phone, but my father-in-law said that my wife had not returned home. I was wondering, didn’t she say she was going home? Why did my father-in-law say she was not at home? Did he go to my parents' place? I called my parents again, but they also said he was not at their place. I didn’t take it seriously at the time, thinking that maybe he was at a friend’s house and his phone was out of battery.

Seeing that I was anxious, Xiao Ru said, "Let me ask Ah Hui to see if he has seen your things."

"Okay, why don't you ask him if he has seen it?"

"Strange, why is Ah Hui's phone turned off?" Xiaoru called Ah Hui but his phone was turned off, so she said to me.

"Just turn it off, what's so strange about that?" I didn't take it to heart and continued looking for my things.

"Brother-in-law."

"Um?"

"Do you feel that..." Xiaoru hesitated to speak.

"What do you feel?" I turned around and saw Xiaoru looking like she was about to cry.

"What's wrong with you?" I asked.

"Brother-in-law, do you feel... feel... feel that Ah Hui and my sister seem to be hiding something from us?" Xiaoru's tears fell. After Xiaoru said this, I suddenly realized that there was something strange about my wife and Ah Hui turning off their phones at the same time. I had a vague ominous premonition in my mind, as if something was not normal. The more I thought about it, the clearer this premonition became, but I seemed unwilling to admit this premonition in my heart.

"Xiao Ru, what do you think they are hiding from us?"

"Brother-in-law, I feel that Ah Hui and my sister seem to be too close. Both of them have turned off their phones. Are they hiding their relationship from us?" Xiaoru finally cried and expressed my concerns.

"Xiao Ru, don't cry first. Didn't Ah Hui say he was on a business trip? Ask his colleagues to see if he is on a business trip." At this time, my mind became clear. Xiaoru took out her cell phone and called Ahui's colleague.

"Ajian, have you seen my Ah Hui?"

"Oh, sister-in-law! Why isn't Ah Hui at home? He told our boss this morning that he was not feeling well and asked for two days off..."

Xiaoru hung up the phone and burst into tears, "Brother-in-law, Ah Hui...he must be with my sister, otherwise why didn't my sister come home? They both lied and turned off their phones."

Xiaoru’s words struck me like a bolt from the blue. I really couldn’t believe that such a thing would happen in our family. But now we had no definite evidence, so I said to Xiaoru, “Xiaoru, we don’t have definite evidence now. I think about this…” I told Xiaoru my plan. Xiaoru nodded with tears in her eyes and looked at me helplessly. Through her tears, I could see that she had regarded me as the only person she could trust.

The opportunity soon came. It was another weekend. I told my wife that a patient of mine needed surgery and she had to work overtime. Xiaoru also told Ahui that their unit had to settle the bills and they also had to work overtime. I vaguely saw a hint of joy on my wife and Ah Hui's faces. After breakfast, Xiaoru and I went out. After going out, we didn’t go to the office, but took a walk outside. About half an hour later, we returned to the door of our home.

I took out the key, gently opened the door, and tiptoed into the house with Xiaoru. Before we reached our bedroom, we heard heavy breathing and the sound of flesh colliding, mixed with my wife's obscene words, "Ah Hui... you are so good... I can't stand it anymore..."

"Sister, today I am going to fuck your little cunt hard and fuck your little cunt to pieces..."

"Oh... big cock... fuck me hard... I love you fucking me..."

I really couldn't stand it anymore, so I kicked the door open. My wife and Ah Hui were both shocked when they saw us. Xiaoru saw this, covered her face and ran out. I was afraid that something might happen to Xiaoru, so I quickly chased after her, leaving a naked man and woman on the bed frantically looking for clothes. I didn't have to chase far before I caught up with Xiaoru. She was crying like a tearful person. I was afraid that people in the neighborhood would think we were a young couple having a conflict and laugh at us, so I simply took a taxi and took Xiaoru to the river.

When we got to the river, I helped Xiaoru sit down. She leaned on my arms and burst into tears. I was very confused and didn't know how to comfort her. I could only hold her shoulders and let her cry, letting her tears wet my clothes.

After crying for a long time, Xiaoru gradually stopped crying and leaned on me. Neither of us spoke, and we were all thinking about our own things. I was thinking in my heart, why would Ahui hook up with my wife when Xiaoru is such a good girl? Thinking of this, I lowered my head to look at Xiaoru. Xiaoru seemed to have something to say to me, so she raised her head. Just like that, I looked at Xiaoru, and Xiaoru looked at me. Suddenly, Xiaoru blushed and turned her head away. In order to break the awkwardness, I asked Xiaoru, "What are you thinking about?"

"I was wondering, why would my sister do that with Ah Hui when she has such a good husband like you?"

"Yeah, I was wondering too. Why would Ah Hui go to Xiao Hui when he has such a good wife like you?"

When I said this, Xiaoru's face turned even redder, and she lowered her head and said nothing. After a while, Xiaoru asked me,

"Brother-in-law, what you said about Ah Hui and my sister is like this, does that mean all men like to cheat?"

I said, “How can I explain this? Maybe it’s because of this!”

"Then...brother-in-law, what about you?" Xiaoru's question stumped me. I admit that all men are lustful, and I am no exception, but which man would admit it? Seeing that I didn't say anything, Xiaoru stopped asking and continued to think about her thoughts with her head down.
I've made up my mind." Xiaoru suddenly raised her head and looked at me firmly. "Brother-in-law, if they can let us down, don't blame us for letting them down."
"Xiao Ru, what do you mean by this?"

"That's...that's it..." I saw Xiaoru hesitated and didn't say anything, and I probably knew what she meant.

"No, Xiaoru, that wouldn't be fair to you."

"Brother-in-law, do you dislike me?" Xiaoru was about to cry again, and I quickly held her in my arms again. "That's not what I meant. I meant that they've already hurt you, and now you're sacrificing yourself to get back at them. Why do you have to do that?"

"Brother-in-law, I did this to get revenge on them, and also..." Xiaoru looked at me and said, "I really like you, brother-in-law. In fact, I fell in love with you the first time I saw you, before you and sister got married. Later, you became my brother-in-law, and I had to bury this love in my heart. Now that they have done something like that, why should I hide myself?"

I was really surprised to hear these words coming from Xiaoru, a quiet girl. But to be honest, when I went to their house with my wife for the first time, I felt my heart pounding when I saw Xiaoru. Although my wife and Xiaoru are equally beautiful, Xiaoru has a more tranquil demeanor and gives people a sense of otherworldliness. In fact, I quite like Xiaoru, too. Now that Xiaoru has said this, why should I pretend to be a saint? So I told her what I thought of Xiaoru.

When Xiaoru heard what I said, her face turned red and she looked at me with red eyes, as if tears were welling up in her eyes again. I don’t know if it was because what I said made her happy or for some other reason. I looked at Xiaoru and felt that she was very beautiful and lovable. My lips involuntarily touched Xiaoru's lips. We kissed for a long time and were very devoted. I didn't notice that my wife and Ah Hui had found us and were standing behind us.

"Xiao Ru..." the wife called in a whisper.

Xiaoru and I turned around and saw my wife and Ah Hui. I was about to explain something when Xiaoru spoke first.

"Sister, I was really angry at first when I saw you and Ah Hui like that, but now I'm not angry anymore. Just give me your brother-in-law."

I admire Xiaoru's straightforwardness and courage, but it also makes my wife and Ahui very confused. My wife looked at Ahui, then at me, and then at Xiaoru, not knowing what was going on.

Seeing his wife's confused expression, Xiao Ru continued, "Sister, actually I fell in love with my brother-in-law the first time you brought him to our house, but since you married him, I had to suppress this feeling in my heart. Now that you are together with Ah Hui, I don't blame you. As long as you can let my brother-in-law be with me, I will not care about you."

The wife finally understood what was going on. She thought for a moment and said, "I was the first to do something wrong to you. As long as you can forgive me, I will agree to whatever you say. The key is to see what Ah Hui thinks."

"I have no objection, I have no objection." Ah Hui felt guilty like a thief and quickly waved his hands to say he had no objection. I guess Ah Hui has to look at my face now. After all, I am his brother-in-law. If I don’t forgive him, he will have to keep his tail between his legs for the rest of his life. Seeing that his wife and Ahui both had no objections, Xiaoru looked at me and asked what I thought. I was too embarrassed to say yes or no, and besides, this was not the place to discuss this, so I said, "Go home first, and we'll talk about it later."

So the four of us returned home together. After returning home, the three of them looked at me. I felt like I was God, as if my words determined the fate of the three of them. So I said to Ah Hui, "Ah Hui, no matter what, you can't dislike Xiao Ru. Xiao Ru will always be your wife, understand?"

Ah Hui quickly said, "I know, I know, Xiaoru, I'm sorry for you, I beg you to forgive me."

I looked at Xiaoru and said to my wife, "Xiaohui, you will always be my wife, no matter what you and Ah Hui did."

"So, you forgive us?" Tears welled up in the wife's eyes.

"Since Xiaoru doesn't blame you, I don't want our family to be broken up because of this. Besides, I like Xiaoru very much. Xiaoru has spoken, so let's do as Xiaoru says." After I finished speaking, I could clearly feel that the three of them breathed a sigh of relief. My wife and Ah Hui breathed a sigh of relief because I forgave them, and Xiaoru breathed a sigh of relief because I agreed to her.

"But I want to add one thing," the three of them looked at me again, "After all, this is not a glorious thing. I hope we can remain the same in front of outsiders and not let outsiders gossip about us." In fact, I didn't need to say this, everyone knew it.
When it was time to go to bed at night, the four of them were watching TV in the living room. In fact, no one had the heart to watch what was on TV, but no one was embarrassed to say that they wanted to go to bed first. I saw that staying like this was no solution. If I didn't say anything, we might have to stay here until dawn. So I got up and said, "I'm going to sleep." Then I looked at my wife and Ah Hui and said, "You guys should go to bed early too." Then I said to Xiaoru, "I'm going to wash my feet. Xiaoru, get me a basin of water." In fact, everyone knows that I usually wash my feet by just rinsing them under the faucet. I said this just to give Xiaoru a "legitimate" reason to go into the room with me.

So I went into the bedroom first, and after a while, Xiaoru came in with a basin of water. Then I heard the door of the bedroom opposite close.

Xiaoru put down the water and was neither standing nor sitting by the bed. I pulled Xiaoru into my arms. Xiaoru struggled and said, "Brother-in-law, don't you want to wash your feet?" Who would have the mood to wash feet at this time? I found Xiaoru's lips and kissed hers. Soon, Xiaoru collapsed in my arms. "Xiaoru, let's go to sleep," I said to her. Xiaoru blushed and said nothing, but started to take off her clothes. I was embarrassed to look at her, so I quickly took off my clothes, got into bed, and took off all the remaining burdens in bed. Soon, Xiaoru took off all her clothes except for her underwear. She got into the bed and lay straight beside me. I was nervous, but she seemed even more nervous.

I turned sideways and hugged Xiaoru. Although there was a layer of underwear between us, I could clearly feel the warmth from her body. Xiaoru looked at me with deep affection in her eyes. I reached my hand into her underwear and gently stroked her smooth skin. Xiaoru's breathing quickly became rapid, causing my heartbeat to speed up.

"Xiao Ru...can you take off your clothes?" After hesitating for a long time, I squeezed out these words.

Xiaoru seemed to be moved, she leaned into my arms and said, "Brother-in-law, I am yours, you can ask me to do anything you want."

I kissed her lips and took off all her clothes with trembling hands. Xiaoru silently cooperated with my actions. At this moment, she was lying naked in my arms, and I caressed her body, enjoying her smooth skin and the deep love.

In the darkness, I leaned over her and held those plump breasts with both hands. The breast flesh overflowed from between my fingers, feeling warm, soft and smooth. I stuck out my tongue and gently licked the pink protrusion, then took the whole thing into my mouth and savored it carefully. I spread out my right hand and gently slid it towards her triangle area. My fingers were gradually covered by nectar. I moved down my body and aimed my glans at the hole as she moaned softly.

"Woo..." Xiaoru hummed softly.

"Are you feeling uncomfortable?"

"Well... no... it's not uncomfortable... it's swollen..." Xiaoru subconsciously squeezed her legs together, making me feel the blissful wriggling sensation inside her pussy, warm and moist. I moved gently twice, which caused Xiaoru to moan. I seemed to receive an order and began to move vigorously.

"Ah...brother-in-law...um...ah..." It seemed that Xiaoru had already gotten into the mood. I grabbed her breasts with both hands, squeezing and rubbing them at will.

"Ah...don't...ok...ok...ah...oh..."

My thrusts were getting faster and faster, and my scrotum hit Xiaoru's pussy with a popping sound.

"Hmm...mm...brother-in-law...I...feel so good...oh oh...my pussy is so hot..."

I pinched Xiaoru's soft breasts tightly with my hands and pumped her tender vagina violently as if punishing her. Xiaoru frowned and clenched my strong arms with both hands. Her labia flipped in and out with the thrusting and the heat in her lower body was unbearable.

"Sister...brother-in-law...ah...I can't take it anymore...mm...you've broken my pussy...oh...I'm going to heaven..."

I turned Xiaoru's body sideways, raised her buttocks, lifted her legs, pressed them under my chest, and then thrust hard into her again.

"Ah...ah...it feels so good...faster...faster...oh...I can't take it anymore..."

Xiaoru's vagina became tighter and tighter and began to twitch. She moaned, "It's almost there... It's almost there... Ah... Ah... Ah..."

"Faster, harder... Brother-in-law... I want you to cum inside me! Brother-in-law... cum... cum inside..." Xiaoru shouted. She had been consumed by lust and had completely forgotten about her husband and her sister living next door to us. Now she only wanted my semen to fill her empty little hole.
I thrust hard and fast. Since her hips were padded high, I could basically hit the center of her flower almost every time, and the force was sufficient. Xiaoru was speechless and could only moan “Oh…ah…ah…ah…um…ah…” Her vaginal walls contracted violently, and she grabbed my arms with both hands, pinching and twisting them hard.
I knew she was reaching, so I accelerated and thrust harder, "Ah..." As she let out a long scream of pleasure, I took a deep breath, "I'm going to cum...oh...cum inside you...cumming...ah..." My hot and strong semen exploded in Xiaoru's vagina and injected into her uterus. The pleasure rushed to my forehead like a bomb and exploded immediately. I felt my head rumbling and the ejaculation made my will blurred.
After the climax, we were exhausted, our two bodies were tightly combined together, the room was filled with the smell of sweat and love juice. I was extremely satisfied physically and mentally, and I felt a little tired. I looked at Xiaoru, she had completely shrunk into my arms, the blush on her face had not yet faded. I hugged Xiaoru, stroked her moist but smooth skin, and fell asleep.

When he woke up the next morning, he ran into his wife who had just walked out of the house. Through the crack in the door, he saw Ah Hui still sleeping naked. His wife's face was red. No one said anything, and after breakfast, they went to work.