Hey everyone, this is a true story of how my boyfriend and I started sharing when we were 19. Just a bit of background first. My name is Stephanie. I'm 23, 170cm tall, About 55kg, pale skin, strawberry blonde hair, and B cup boobs with pink nipples. My boyfriend's name is Mark. He's 23, 6ft, short brown hair, 70kg and good looks. He has a 6-7 inch penis, which keeps me happy. We have been together for 5 years and have a pretty good sex life. About a year into our relationship, Mark and i were invited to our good friend Jason's party. He lives a fair way from us. So, rather than get a cab home we had both organized to stay the night in Jason's spare room. It was a really good party, and the two of us ended up getting pretty drunk. Throughout the entire night, Mark would tease me by touching/stroking bum or vagina over the top of my shorts. It was driving me crazy, and asked him on numerous occasions if we could sneak off for a quickie. He just laughed and said we should wait until everyone was gone. Then we could fuck for as long as we wanted. It got late, and everyone had started to leave or call it a night. Jason had a spa in his backyard and asked us if we wanted to have a few drinks in there. The remaining 5 of us thought it was a great idea and stripped down to our undies and hopped in. The drinks flowed and it got late, and one by one the people in the spa dropped off to bed or home. Pretty soon, it was just myself, Mark and Jason. We were chatting and laughing away when Jason suggested we play a drinking game. Mark and i were up for it. So he said, "cool, why don't we make it truth or dare"? We both agreed that it would be fun. The rules were if you didn't do the truth or dare you would have to finish your drink. Mark volunteered to kick things off, and straight away dared me to take off my bra. I was already really drunk at this stage, and had a full drink that i didn't want to have to finish. So, i decided what the hell, we're all friends here and took my bra off, much to the woo's and applause from the two boys. It was a big turn on letting another man other than my boyfriend see my boobs. The game continued on for some time, and eventually when we were all naked the game trailed off and we were once again chatting and laughing again.. Jason asked if either of us needed another drink. We both said yes, and without hesitation he got out of the spa fully naked. At this stage, i had only ever seen Mark's and one other guy's penis, and Jason had them both covered. It was flaccid, but about as big as Mark's is when he's hard. I looked away, so i was not to stare and Mark saw me and laughed. Jason said "my eyes are up here Steph" which the two of them found hilarious. I, on the other hand was a tad embarrassed. I also found myself wondering what it would look like hard and if it grew much. Jason returned from the esky pretty quickly, gave us our drinks and sat down next to me so that i was in the middle. However, when he sat back down, i felt him put his hand on my knee. I was still very drunk, and chose to ignore it. I thought he was just being friendly. However, every few minutes his hand would creep higher and higher. I didn't want to admit it, and maybe it was the alcohol but it was starting to really turn me on. I felt so naughty, having another guy feel me up underwater while my boyfriend was sitting right next to me. Jason then moved his hand higher towards my vagina. I hesitated, thinking Mark would throw a fit if he found out. After a while of him stroking my leg, it got too much for me and i opened my legs, letting him know it was okay. His hand touched my pussy which was now on fire. He started to rub my clit slowly. It felt so good, and I was having a hard time trying to hold the conversation, but did my best to continue the chat and jokes as if nothing was happening under the water. There was a break in conversation and Jason had picked up the pace. I let out a little moan and Mark asked what was wrong. I replied "oh nothing i just stubbed my toe". Mark said "aw, poor baby" and kissed me. He must have been horny too and put his hand on my leg. He realised that my legs were open, and moved his hand towards my pussy, when he found another hand had already got there first. He broke the kiss and jumped back a little bit. I looked him in the eyes, and said "it's okay, i love you". I leaned over and kissed Mark hard, he returned the kiss which was a good sign. While i had leaned over and was on all fours Jason stuck a finger inside me. I began to moan a little but continued to kiss Mark. Soon he had 2 fingers pumping in and out of my vagina. It felt so good, and i could already feel an orgasm building. Just before it hit, the kiss broke because i couldn't concentrate. I moaned loudly, Mark pulled my head into his chest, and said "it's okay, good girl, let it out" as i came hard on Mark's fingers. I was still catching my breath, with my arms around Mark's neck and head on his shoulder when i felt Jason get up and move behind me. I felt him place the head of his penis at the entrance of my pussy. I popped my head up and looked at Mark, and he just said "it's okay". I told him i loved him. And he said "i know, i love you too babe." Then with a grin on his face he said "Enjoy". At this point i still hadn't seen Jason hard, but could feel how thick it was. My vagina wasn't used to the thickness, and it took some work easing it's way in. I could feel him go deeper and deeper with each little thrust, filling up my pussy more and more with every stroke. He eventually got all the way in, and it felt like a totally new experience for me. My pussy felt so full. His pace started to pick up and i remember all i could bring myself to say was "oh god" over and over. I kissed Mark and reached down to feel his dick, it was rock hard. He jumped up to the ledge so that i could suck it while he sat down. This was great a great moment, sucking my boy while our good friend fucked me from behind with his huge cock. Jason started to pick up the pace and i could no longer concentrate on sucking Mark's dick because it felt too good and i was beginning to moan quite loudly. Jason reached around and started to slap my pussy, which sent me over the edge again. For the second time, and very soon after, a third time, another man was making me cum while my boyfriend watched on. He continued to fuck me hard and was not letting up. The alcohol must have given him a fair bit of stamina. I was on the brink of my fourth orgasm, when Jason started to moan and fuck me harder. I was on the pill, but Mark and i usually use condoms just in case. Jason slowed down and asked where he should come, and i told him not to stop and that i was cumming. He picked the pace back up and i could feel his cock spasm inside of me as he was cumming. I gripped onto Marks arm as my fourth orgasm washed over me. I was still very young at that point and had never cum 4 times in the one night before. Little did i know there was more to come. We caught our breath and i kissed Mark, and all he said was "wow, that was hot". I could tell he might have been a little bit jealous, and he later said that he was. But once we started the jealousy went away and he found it a huge turn on. I kissed Mark hard, and started to play with his cock again. Jason said "I might head to bed, and leave you two to it". He thanked us both and said goodnight. We were still a bit in shock at how quickly it all unfolded. We had a quick chat about what had just happened. Followed by some of the best sex we'd ever had together. We decided to call it a night and the two of us went to the spare room, only to find that there were lots of people sleeping there and there wasn't really any room. Mark smiled and said "oh well, we might just have to bunk with Jason". I laughed and we both headed to his room. I'm tired and can write what happened next another time. That is if anyone wants me to. Let me know :)