So first time posting, have been thinking about posting for a while but didn't have the courage.
A little about me, tall,skinny 27 years old, have been in five year relationship and been going great, we have a mutual best friend let's call her "(K) ara", I met K first on a job site, we became very close and a couple of times we slept at a friends house she has snuck into my bed as it was too cold in her room, nothing ever really happened but it was really close and we cuddled. I never told my gf though. So coming way down the line about a year later K and I are heading south for a golf trip and meeting another guy down there and staying at his house. Let's call him (D) ave. D has two bedrooms for us side by side and quite far from his bedroom. We start drinking as soon as we get to his house, end up going to the pub and getting plastered. We all make it back to the house stay up for a little but until we call it quits. So K and I head towards our bedrooms and D goes to his and closes the hall way door to his bedroom and his bed room door (so that's two doors he's closed, wouldn't be able to hear a thing) . So K and I start getting ready as you do, and once I'm ready to go to bed she asks "do you mind staying in my bed, as friends cause I'm too scared" and I say "I don't think it's a good idea" but K emphasis again "it's just as friends. We'll go to sleep".

So sure enough I'm in my boxers and jump into the bed and turn so that my back would be facing her once she gets it. K turns the lights off and jumps in, all is well until she starts slowly moving her butt back towards me, at this point my heart is racing and I'm slightly horny. K slide into me and rolls over so she's holding me. I then roll over so we're both just cuddling.
So we're both cuddling each other and her face slowly gets closer and closer to mine, I can't take it any more and I'm diamonds and she has got to know by now, I dive in and start kissing her, she kisses back and we're feeling each other all over, I'm grabbing her ass and she's making her way over to my hard cock. She grabs hold, and stops kissing and says "oh my god your huge", (now I'm not one to brag, but I have had many girls say I'm huge, although I didn't believe the first few I'm now confident in saying I am), so back to the story I continue the kissing and roll on top and my hands start making their way to her pussy, K is soaking and can feel it through the panties, I slowly start rubbing her clitoris, but K mumbles "you have a gf we should stop" to which I replied "it's too late now we have come this far" K continues kissing me and stroking my cock. K rolls me back over so she's on top and takes my boxers off and and starts to give Me head. She was incredible, the slurping the movement I could of came if I wasn't so drunk. I tell K I "I want to fuck your tight pussy!" I have no condom, but it didn't seem like either of us were phased she gets on top, but tell her "careful my cock is big I don't want to hurt you", K grabs my cock and says " I want your huge cock inside of me" and slowly inserts me into her wet pussy. (a side note: I love it when girls tell me how big I am when I'm inside of them, I don't know why but it makes me go insane!) So we're fucking pretty hard at this point and K grabs my hands and outs them on her perky tits saying she loves when they're squeezed and played with, I have to tell her to quite down more than once as she's moaning soo loud. Just the thought of her on top of me is making me hard now.

I tell her I want to fuck her doggy style, and we get into position, I start pulling her hair and slightly putting my thumb into her ass, she's going crazy, she's moaning and asking me to slap her ass, all while the creaking bed isn't helping any of us. We fuck for another 5-10 minutes before K says that we should stop. K gets dressed and I put my boxers back on, we both cuddled for another 15-20 minutes both still teasing each other with kissing, stroking, light fingering and ass slaps. Eventually we stop she's asleep and I sneak out to my own room.

The next morning we all met at the kitchen table and we both played it cool like nothing happened, but looking at her knowing full well what we did a couple hours prior.

K and I were driving a little more south that day and and after 5 minutes into driving I said I think we should address what happened last night. We were both agreeing it never needs to be talked about and that my gf can never find out.

Once we got to the next spot we stayed at D's other house and we're in the bedroom with 2 single beds, I was kinda nervous and excited all at once, now nothing happened during the 2 night sleep but the 1st morning she came and jumped into my bed with me and just says I'm sorry but I just love cuddles, and sure enough I cuddled back and worked my hands up to hold onto her boob's, but that was it that was the final thing that has happened since.

I periodically have sex dreams about K and myself, and regularly think about it, I feel pretty bad about my Gf not knowing but it was such a thrill.

Anyways it's good to finally post this I hope you like the story