Mom At The Beach

I confirmed it finally with her about a year ago. When I was around 13, old enough to know what was going on. My moms boyfriend took us, including my sister who was a year younger, to a nude beach. I had a perpetual hardon and her BF told me not to worry, not even try to cover it up, and indeed he had a hard one too, as did a lot of the guys. My mom and he left my sis and I and told us to stay on the beach sunning. He came back and wouldn't say where she was. I starting noticing guys standing around these dunes, and wandering behind them. I snuck over where he couldn't see me and peeked over one of the dunes. There was my mom with about 6 guys standing around her, holding two cocks and getting fucked by another. He finished and another piled into her. I eventually got my sister and showed her. We played around like mom for a while, I got on top and rubbed against her pussy and lower belly while she pulled her legs up like we saw mom. My sisters pussy was really wet and she said it felt good, and I eventually shot off on her belly. We went to wash it off in the water. We were laying on the towels when we say mom coming out from behind the dunes, with several guys coming behind her, and splitting in different directions. She had a towel between her legs and was wiping her pussy.

We say white sperm on the towel and still she had some in her pussy hair, and I saw some on her boob and her neck. I never found out how many guys, but years later I asked her about it and she confirmed it. That boyfriend introduced her to gangbangs and she did several with him and without him. By the way, eventually my sister and I would let my cock rub between her pussy lips and we'd both get off. We did that for about 4 years till I finally got a girl to let me fuck her.