The day my mother in law saw me naked
My mother in law was coming to spend the weekend at our house and my wife and I were doing last minute cleaning before she came over, my wife was downstairs vacuuming. I was in the upstairs bathroom and had gotten soaking wet after running the shower to rinse off the shower walls. Since I was in the bathroom and across the hall from my bedroom I decided to take my wet clothes off and walk across the hall to get some dry clothes. I was in the act of tossing my wet clothes into the laundry hamper just next to bedroom door when I noticed multiple people. There was my mother in law and my wife sitting on the bed and me fully naked standing in the door way surprised. Neither one of them said a word but both just stared right at me. I'm not sure how long I stood there but my thought process went into "Fight or Flight" mode and I said "Oh, sorry." and turned around and walked back into the bathroom and shut the door. While I was in there all I could think about was "Fuck, she saw me, so did my wife, this is going to change everything". I waited until I heard them go downstairs and then a few more minutes. When I figured it was safe I went back to my room, the coast was clear, and I got dressed. About 20 mins had passed and I went down stairs, and at the bottom of the stairs waiting for me was my mother in law and my wife, and I knew we were all going to talk about this right now instead of later. I decided to break the ice and said "am I wearing enough clothes now?" and without missing a beat my mother in law pulls up her shirt and bra and flashes me her breasts and says "there, how's that, are we even or do you want to see my puss too?" and reaches down to grab her pants. I said "NO, I'm good!" as my entire face flushes red and my heart beats super fast. The whole time my wife just stands there speechless and shocked. I don't know if she said anything, I can't remember. Part of me wanted to say "YES, show me!" but I knew my wife was right there and our kids were in the house, so nothing was going to happen and I wasn't going to cheat on my wife, but every guy has had that fantasy and we all have google searches for "Sex with mother in law, mother in law saw me naked, I saw my mother in law naked, guy fucking a mother and daughter, etc". Nothing was expanded upon after that interaction and the subject quickly changed. My mother in law left later that day saying she had decided to get a hotel instead of staying in our guest room in the basement (so much for cleaning the entire house). That night my wife and I had sex but it was hard not to think about my mother in law's breasts. My wife and I talk about our fantasies while having sex because she's been in a threesome with another woman and I haven't so she always indulges loves to hear me talk about women I see at work or while I'm out shopping because it turns her on a lot and we have great sex. I am always honest about my sex fantasies and that night I let slip that I had a fantasy about having sex with her mother ever since my mother in law had told me that she hadn't had sex in 7 years, so I told my wife I would be willing to help her mother out of her dry spell if she ever asked me too. My wife's reaction was to get really wet and tight, which caused me to get harder and cum. But from that day on for about the next 5 weeks it was impossible to have sex with my wife without having images of her mother pop into my head because they had nearly identical breasts, right down to the size and color of their areolas and big suck-able nipples, it was just that her mothers were a bit more aged and sun-spotted from all of her tanning. I haven't seen my mother in law naked since that day, nor has she seen me, and none of us has spoken of it since.