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If you have read my previous story then you’ll have the necessary backstory, but I’ll briefly rundown.

My wife and I are staying with our in-laws and as well as my wife’s younger sister. Our rooms are right next to one another, and there is an adjacent bathroom. One morning, in the throes of self-pleasure, she caught me and didn’t leave—she stayed and watched.

Now, as noted before, my sister-in-law and myself are both night owls. Late one night, after my wife fell asleep, I went to the kitchen to get some water. Heading to the kitchen meant passing my sister-in-law’s bedroom as our room was the last room in the hall. It’s worth noting that the moment you step out of one room or the other the door to the other room is immediately to your side. In this, her door is to my left.

As I step out, I notice her door is slightly ajar, which is par the course, but I swear that, out of the corner of my eye, I saw her head cocked and her mouth slightly agape. Now, considering our recent experience, my curiosity is piqued. I go to the kitchen, heart racing, and pour myself some water all the while debating if I should go back for a more thorough inspection. Regardless of my decision, I have to pass by to get back to my room. I figure: what the hell? What could it hurt?

Making my way back fills me with nervous anticipation. My heart is no longer racing, it has beaten its way out of my chest. My hands are numb, and I damn near drop my water. As I approach her door I slow to a crawl. Through the crack in the door, I can see the faint illumination of her room via the television. I edge around the corner and my suspicions are confirmed. Her hand is below the blanket line, eyes closed, mouth agape—she was playing with her pussy.

I stood there shaking—my hypnotic state broken by the splashing of cold water on my hand. My reflexes kicked in and I struggled to contain the water causing me to bump the door. My heart sank, a lump grew in my throat, I surveyed the room and the door was now slightly more ajar. My sister-in-law was gazing out toward me. She didn’t stop.

As she looked out towards me I felt my cock stiffen harder than it had already been. My shorts bulged as the limitations of the fabric was tested. I looked over to see if my wife had stirred, but she had not. I sat my water down on the edge of a small half wall that ran along the hallway leading out towards the kitchen. When I turned back towards my sister-in-law’s room I was met with a sight: she had revealed herself from beneath her blanket. I could see her legs bent and spread, hand swirling beneath her panties. There were no secrets now.Without thinking, without questioning, I put my hand on my cock and I started to stroke. The nervous anticipation had turned into unbridled ecstasy. I could feel the warmth of my hard cock in my hands, but it almost felt foreign. My wife was sleeping just a few feet away—she was separated from her masturbating sister by only a thin wall.

She was staring at me. Mouth open wide, eyes full of bliss. I could tell that this is what she wanted and she enjoyed watching just as much as being watched. I tried my best to still my breathing to avoid waking my wife, but it was impossible to silence myself in this euphoric state.

It was not long before she started to quiver and shake—her pleasure had been building and she was ready to cum. Her eyes went white as her head leaned up towards the ceiling. I could see her reach her fingers in deep as her body convulsed. In that moment I lost all control. I let out a moan and a grunt as cum came spilling out of my cock—ropes so thick and heavy you could hear them splattering against the carpet.

She lay there still in the moment completely satisfied. I stepped back out of the room, grabbed my water, and went and laid down next to my wife.

As I laid there, taking it all in, my wife turned and nuzzled in, her leg rested up over mine. I notice a warmth about it.

She asked me, “did you have fun?”

NSFW: yes

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