It was 2004, i was 22 and i lived in my parents house. I had plans to move out, but i just hadnt found the time. My mum was never home, she was busy with her job of being an accountant and was always abroad. My dad was also always out as he'd go out drinking one day and return two days later sober. So even though i technically lived with my parents, i never really saw them. I have an older sister, she was 28 at the time, she didnt live with us but every week she'd come and visit. My sister (Sally) is really beautiful, she's blonde with blue eyes, she's about 5'7, has big tits and a lovely round arse. And i often would try to watch her shower. One time when both our parents were out, Sally and her boyfriend came over. And we decided to get a little bit drunk, we played a shots game where we would pick a card at random from a deck and the person with the lowest card had to drink a shot of vodka. After about an hour we were all drunk and i know i was horny. We started daring eachother to do things. The first dare was for me to lick sally's boyfriends (Jon) nose. Which i did with ease. Eventually i dared my sister to completely strip, and reluctantly she agreed, she even put on a little strip tease for us, unzipping her dress slowly, pulling her bra over her head revealling her beautiful tits with hard nipples and then she pulled her panties down revealling her lovely tight pussy and great arse. The next couple dares included me and jon stripping. So then we all sat there completely naked, me and jon hard amd mostly looking at sallies sexy body. Then to both me and jons surprise, sally sared me to suck off jon. I immediatly said no, as up until then i was a straight man, but sally kept on telling me to do it, and im not sure what finally got me to do it, the alcohol or my sisters great tits, but i placed my hands onto jons already hard cock and started to stroke it. Jon seemed to enjoy it, and after a few minutes of stroking i placed my tongue on to the head of his penis, his penis was quite large, it was thick and about 7 inches long. I placed it into my mouth and started to suck it. I sucked it with my mouth and stroked it with one hand as i jacked off with the other. Eventually jon came in my mouth, and just before i was about to spit it out, jon dared me to swollow it, which i did with relative ease. I then dared sally to let me give her head, she smiled and nodded. She then spread her legs and i placed my head just over her pussy. She guided my tongue into her pussy and she moaned and i ate her out. She then laid me down and sat on my face. After a few minutes i felt my dick being sucked off and i was extremely happy as i thought it was by sally, but when i looked i saw jon deepthroating my dick, and it felt soo good! Sally squirted in my mouth at almost the ecact time i jizzed in jons mouth. I swallowed it and so did jon. Jon then grabbed sally and pulled her towards him, he then slid his dick between her pussy lips and started to fuck her, her ass looked so nice and her tits bounced up and down to the rythem of jons thrusts.Im not sure what came over me but as jon fucked my sister i went behind him and too both jon and sallys surprise i slammed my cock into his ass. He let out a small yelp as i penetrated his ass hole. As he fucked my sexy sister i fucked his ass, the pleasure rippled through me and after several bliss minutes i came for the second time in jon, this time however into his ass. I saw the grin on his face as he felt my hot liquid inside him. He then pulled his dick out of my sisters wet vagina and came all over her face, i then pulled out of jon and went over to sally and licked the cum off her face and swollowed it, then i placed my cock between my fit sisters legs and slid it in her pussy, it was so warm and nice i started to fuck her faster and faster and just before i was about to climax i felt something big and thick enter my anus, i turned to see jon sliding his massive cock into me and i let him, it felt glorious,i was being fucked by this sexy guy as i fucked my goddess of a sister, and then i climaxed for the third time bit this time into my sisters pretty pussy. Then i felt something warm ouse inside me, jon and cummed in me again and it felt great, he then pulled and we were done. I had fucked my sister, i had fucked her boyfriend and i had been fucked by my sisters boyfriend, and im sure we would have done it again... But my sister became pregnant... With my child. Therefore she could only suck my dick and recieve anal. Oh well, the fuck was worth a baby