Here is one from the you can't make this up file.
When I was an undergrad, I was dating the local girl who went to a nearby junior college. The sex was good, but kind of plain vanilla. One night, while waiting at her house, for her to come home, her mom comes out to my car by the curb and invites me in. She starts with the strict mom routine and that she knows I am fucking her daughter (duh?!?!). She leans in, nose to nose with me and puts her hand in on the chair, between my legs. Mom was definetly a MILF. At this point I started to squirm a little, because 45 y/o women don't come onto 21 y/o guys all the time, except in pornos. She notices that I am a little uncomfortable and says something like "I see your uncomfortable, let me help you out" and proceeds to unzip my pants. At that point, I wasn't waiting for Clare to get home, I was gonna nail mom. That was some stellar sex. Mom really knew what she was doing with a dick. Clare was downstairs when I was leaving her mom's room, with my low swinging balls slung over my shoulder. Apparently Mom had been fucking all the guys Clare and her sister dated. They threw down right there in the living room as I left. Needless to say, Clare and I didn't go out again. I also hooked up with her older sister, who I ran into at the bars a few months later, she pretty much explained the whole thing to me. There was no second encounter after I asked about three or foursome with her mom and sister. I am sure mom would have been down for it.
I managed to avoid shacking up with the youngest sister, but only because she wasn't legal, by several years.
Clare's mom was, to this day, prolly the best lay of my life. She did shit to me that I hadn't even heard of. She rimmed me for the first time, which damn near had my eyes falling out of my head. She let me bust my anal cherry with her, but not before licking her ass. She checked my oil mid-BJ, which was a first for me and led to the rimjob. She deep throated me like I was 2 Advil. She rode me endlessly and somehow managed to contol my arousal, because we fucked for close to 2 hours on only 2 orgasams for me. She seemed to have had a dozen, but I have to figure most of that was her playing out some kind of act. And I am pretty sure if Clare hadn't come home, she woulda made me dinner too.
And then there is the girl who I watched blow like 10 guys one night at my fraternity. Take you pick.