First time I saw fully nude couples in front of me, now he started to suck her one boob and squeezing other. My grandpa holds my hand and asked me to ...eep silent and watch them without making any noise. I was getting horny while watching them; we were around 10 feet from them. They can’t watch us but we can watch them this side. My grandpa came behind holding my hips and watching them. They were in the knee deep water, now I saw her bottom fully, she got good body shape, hairless pussy. He got. He whispered, "Soon, lady. Real soon."Colt had been aware of one of the girls moaning "No, please No!" Before he heard the sharp crack a very hard slap.This was accompanied by Snake snarling, "Open that mouth you little bitch!"Another slap. Then Snake saying, "That's a good little girl. You just do ole Snake really good, and maybe I won't hurt you later when I bust that cherry."Colt couldn't help but steal a look in that direction. Seeing Snake with his hands in the girl's hair moving her head. "Put on your favourite pair and come to the washroom" I did as I was told. I stripped naked and put on my black silk panties. As I wasted into the washroom I saw him completely naked with towels. "We're going to shower first, get my girl all cleaned up" he said. I didn't argue (even though I just showered) he got in first and then called for me to enter. He told me to keep my panties on. I slid the shower curtain open just enough to get in and I could see him soaking wet with his huge cock out!. .leave 'em!" he said again."But...they're brother and sister!!!" she protested.She saw a faint, almost evil, grin form at the corners of his mouth, and then he responded, "So what?"Part TwoThe second incident happened about two weeks later. The twins were playing in the yard when Sarah fell and yelled out in pain. By the time that Johnny reached her she was sitting up, on the grass, with her back against a tree. She was rubbing at her ankle and she had a tortured look of pain across her face..