Since Moms BF was living with us we were nudsits, beaches, resorts. We were at a beach, her BF watching us, we went exploring and saw mom gangbanged
Her BF moved in with us when I was 8 and my sister 9. There was a change in my mom, she started showering with the door open, even going to the toilet with door open. Their bedroom door was never closed even when they were having sex. My sis and I shared a room and we were encouraged to sleep nude, as our mom and Tom did. Soon it was normal, unless someone was coming over we were nude in the house, in our hotub, we even saw Tom and mom have oral, pussy and butt sex eventually. That started in the hotub while we were in there nude. My sister and I were now 10 and 11, and we were touching each other, even sometimes sleeping in the same bed naked. Mom didn’t seem to care. She would cuddle next to Tom on the couch, naked and soon he was pushed into her from behind, both laying on their sides. My sister would sit on my lap too, no one said anything.
One day about 2 years later at the nude beach, Mom was gone for a long time, we asked Tom and he just shrugged it off. Eventually we got away from him and playing in some dunes we swore we heard her. We started to run over the dune, but then stopped. Hiding behind some reeds, we watched. She was laying on her back on a big beach towel, one guy was between her legs fucking her, another was in her mouth. Other guys, some teens some old men were standing around tugging on their cocks. The two guys came, and when the one got up we saw all the white between her hairy pussy lips and on the towels between her legs. She was swallowing the other guys cum. We watched as she took on three more and there were at least 5 more standing by. We went back to Tom and pretended all was good. When mom came over the dunes there were about 7 guys trailing her, there were more who came and went before them. She was walking slowly, and sat down on our beach towel very gingerly. My sister whispered to me, there was still some white stuff between her pussy lips. Tom and she kissed very passionately and he was gently rubbing her nipples. He started to move to her pussy but she grabbed his hand and stopped him. “Too sore” she said. “It’s gonna be a while” he asked “How many this time?” the answer 15 times from 12. We knew what it meant but pretended not to.
That night my sister and I got in her bed. I licked her pussy, she sucked on my cock we both came. I got up to get a drink of water as an excuse to see if Tom was fucking my mom. She was just jacking his cock, that lasted another three days before he fucked her or got a BJ again. In the meantime my sis and I found sex. She was getting hairy by then, she had her period so I only came in her the first couple times. After that I either came outside, in her mouth or after a while we started anal and I could cum up her butt.
Tom is gone, we are 19 and 20 now and still go naked in the house, and still go to nudist resorts and beaches. My sis and I still sleep in the same bed, she is on birth control after mom found us fucking. My mom is pretty open and we asked her about that day on the beach. Tom enjoyed seeing her with other men or women, and occasionally she would let a lot of guys gangbang her for his enjoyment. She said that normally he could watch and usually went last but it was always several days of being too sore for sex after. But it was months of special sexual thrills for them both after.