Parent sex - Mom sex

[Lumberjack95]

I first saw my mom fucking my neighbor uncle almost 15 years ago. Uncle's son was my schoolmate at that time and we were friends.

I saw both of them naked, mom was on top of uncle, riding his dick. Saw them from the back 3/4-th part. Mom is very fair and has a big ass (about 40-42 inches) and also has ample boobs (probably 36 or more). Uncle was mauling mom's boobs and also thrusting his dick from below. He has a very thick cock as well (he is of wheatish complexion but his cock was darker than the rest of his body, almost black). Don't know how long his cock is as it was thrusting in and out of mum's pussy.

Uncle was using her pretty hard. It didn't look like it was their first time doing it.

I was shocked to see them initially but then became horny and felt myself having an erection.

I have two younger siblings (brother and sister) and I suspect both are uncle's, but I'm not sure.
Mom and uncle still sleep with each other whenever they get the chance and I don't think anybody else knows about their affair. Mom and dad are still together and so is uncle and his wife.