There were a lot of oohs and aahs while Pete did her front; but I sat quietly and waited for Pete’s voice telling Sis to turn over on her back again... This would be the beginning of the erotic section of her Christmas present. I took a chance by staying in the living room; if Cin didn’t approve and got up quickly, I would be discovered lurking in the living room. It might be difficult to explain my embarrassing presence. So far so good; Pete was kneading Cin’s butt, rocking her from side to. She giggled then said, “Oooh, you are kinky.” She put one of her feet up on the edge of the sofa as she pulled my head into her crotch. She was grinning from ear to ear as she said, “Good boy, suck all of his cum out of my pussy and swallow it.” I easily complied. I could taste his cum, but it didn’t taste any different than my own.After a few minutes of that, she stripped my jeans off and straddled me on the couch. As she lowered herself down onto my cock, her pussy felt silky smooth from his. She was wearing a bikini bottom with her lovely big boobs bouncing as she walked. Unfortunately they were not comfortable and she covered up her boobs, having been hanging back I took a shortcut and then passed them on the path saying a cheery hello and they said hello and she smiled in return, I guess I should mention I spend the whole time naked when I'm there unless the weather dictates its not possible. They then went back to the field to sunbathe some more.A little later I went to my Van. Then one day my younger brother busted me. He said he was going to tell mom what I was doing. I talked him to trying himself which he did, and he liked it. Soon my brother and I would both be in there jacking off and cumming on mom's pussy. I thought it was fun to watch our cocks squirt cum all over mom's cunt. Then one night brother and I were really going at it when my older sister walked in and busted us. She had been watching us for quite some time and had herself all worked up. She wanted.