I've had bi incest with my twin brother and younger sister we were 15 and my sister was 13 my brother found a bi adult magazine on the way home from school one day and showed it to me it was a bit tatty but had very explicit pictures and stories well we both got hard as we flicked through the pages I noticed my brother rubbing himself I did the same I decided what the hell and pulled my shorts an d underwear down and played with myself brother did the same we saw a picture of two guys touching each other and wondered what it would feel like to be touched by someone else so I reached over and took my brothers penis in my hand he stiffened up and mound he felt hot and hard and soft at the same time he took hold of me I was in heaven the feeling so good then we turned the page there was a woman watching two guys sucking each other in a 69 I said lets try this he said hell yes we shifted position I held his penis stuck out my tounge and touched the tip I could taste his pre cum it tasted good so I put him in my mouth he yelped and told me not to use my teeth as we got into sucking that's when we got caught by our sister we didn't hear her knock on our door and she walked in all we herd was o my god I'm going to tell mom we pleaded with her not to tell we would do anything if she didn't tell she said ok let me watch or ill tell mom we had no choice we were soft by now so we started to play with each other again we soon got hard because we where being watched as we started sucking we saw sis touching herself and said join us she took her nightie off and her panty's where wet I said take them off as she did it was the first time I've seen my sis naked since she was 5 that sent me over the top I said I'm Cumming I came on my brothers face he didn't tell me and came in my mouth I had no choice but to swallow I didn't like the taste now it was sisters turn we showed her a page that showed a man licking woman's vagina and playing with her tits bro went first licking her slow she gasped and arched her back and said that feels good I got hard instantly I offered it to my sis she slowly put it in her mouth I said don't use your teeth sis was bucking hips and moaning we swapped round a few minutes later and as I was licking her she filled m mouth when she came this happened only three times we never had intercourse and me and my brother never had anal I'm now 59 and never been with another boy or man