Trying to sleep

Dad was in the process of remodeling my bedroom so as my room was being worked on I had to crash on my sister’s floor until my room was done. It was a Saturday night and I had decided to go to bed my sister was already in the bed asleep so as I lay there trying to go to sleep mom and dad were in the other room and they were talking but not loud enough to make out what they were saying so as I dosed off to sleep only to be woken up to what sounded like soft moans so I looked up at my sister and she was still asleep the moans became more and more and a little bit louder at this point as I laid there I was starting to get hard so I started to rub my cock thru my shorts as the sounds got a bit louder I began to stroke my cock to the sounds of my mom getting eaten or fucked by my dad so I slowly stroked my cock and where I was positioned on the floor I could see my sister in her bed moving around so I quit stroking my cock and pretend to be asleep as I lay there I look at my sister and I can see her hand moving around by her pussy and as I thought surly she isn’t playing with herself and as moms moans increased and a bit louder as dad was fucking her I could see my sisters hand moving a bit faster and her breathing was getting faster and heavier so I slowly stroked my cock as I was watching my sister play with her pussy and listening to mom and dad fuck moms moans got louder and I could hear my sisters moans now which made my cock even harder. Mom was getting fucked good as I could tell from the sounds coming from their room and I could here my sisters wet pussy as she was playing with herself as I stroked my cock I could hear mom and dad fucking and not long after that I heard dad say he was gonna cum and mom said fill my pussy with your cum and as my sister was on the edge of cumming I could see her thrusting her hips up as she was cumming as I watched her movements I was at the point of cumming so I reached for the towel on the floor so I had something to cum on and not make a mess and as I came and milked all of the cum from my cock my sister had rolled over the other way and started to go back to sleep then the hall light came on and I could see moms naked body walk by the bedroom door with that freshly fucked look as her tits bounced she walked to the bathroom to clean up. The next morning I got up and took a shower and as I was in the shower I’ll I could think of what I had witnessed last night as the water rained down on me my cock was getting hard just thinking of my sister playing with herself and the thought of mom getting her pussy fucked by dad and as my cock got harder I started to stroke it till I came in the shower then cleaned up and got out of the shower and got ready to go downstairs at some point my sister had gotten up and went down stairs when I got down there I said good morning to her and she said good morning back and as I sat at the table eating my bowl of cereal she asked if I had heard anything last night and I said no she replied with she was just wondering because she thought she heard mom and dad having sex and I said really but little does anyone know is that we all came last night as mom was getting fucked by dad.