Apologies for the break..... I thought I would start the orgasms rolling, a gentle wank, building in speed and pressure always does the trick...and off she went, the first (of many) body shaking orgasms....Bob was watching and took my queue and took over as the first orgasm subsided, copying what I did and being rewarded with the same result quite quickly....as I said the first is the difficult one, the following ones came much easier.... Next Bob decided he wanted to go down on her and slipped between her thighs and was soon lapping at her pussy juices and teasing her clit with his tongue....I knew she wouldn't cum that way, but she did enjoy it and it kept her on the edge, and it gave her time to recover for the next orgasm.....whilst he was doing that I moved up to her head and guided my cock into her mouth and gently fucked her face whilst she sucked and licked my cock greedily.....it was so horny with my gf tied there, with my cock in her mouth whilst my mate had his head buried between her legs eating her out..... Time for more orgasms so I reached down and started to wank her off again whilst my mate continued to lick her clit with the end of his tongue...and it wasn't long again before she moaned and clenched up again with the next orgasm....she wasn't a "gusher" like the lovely lady I had met many years later on the beach (see Beach Fun) but you could see the extra moisture appear, which my mate lapped and sucked up by thrusting his tongue in as far in as he could.... And we swapped around, he moved to her head and grabbed it and pushed his cock roughly into her eager waiting mouth....I moved down between her thighs and pressed my tongue hard against her clit whilst I inserted my thumb into her pussy and gently stroked her bum hole with my index finger.....I looked up and my mate was till quite roughly face fucking my gf and grabbing a handful of her to hold her head in place....and she was taking it in her stride trying not to gag too much....he slipped his cock out and offered up the end of his cock to her waiting tongue...I could see the pre-cum leaking and she lapped it up sticking the end of her tongue into his japseye, trying to coax even more out.... And that's how we carried on, moving around, one on one said one on the other, changing places, alternately wanking, lickin, finger or face fucking her until I could feel that she was getting to the end of her energy....until then there had been no talking as I didn't want her to have any clue which of us it was, so the only sounds had been her moaning whilst cumming, or the sound of her slurping either cock, or even the sound of very wet fingers being pushed in an out of her wanking her off....so it almost made my mate and me jump when the first words were uttered, by her....saying "so are you two bastards going to fuck me as well, as I'm tied and cant stop you doing anything you want...." No more encouragement required, I nodded to my mate that he should be the first to slide his cock into her....I moved around and pulled both of her legs up so they were up in the air offering her exposed pussy to him...and her moved around and in one fluid motion slammed his cock straight into her soaking pussy, right up to the hilt and stated to bang her hard with long forceful strokes.....I held her in position and watched him repeatedly bang his cock hard into her whilst she moaned in pleasure....after a while we swapped over to keep up the pace and pressure, and so she again couldn't work out who was in her at the time.....she was clearly very turned on and soaking... Then we rolled he over onto her front and got her to push herself up onto her knees....and stick her ass out....Bob positioned behind her and grabbed hold of her hips and thrust into her again....whilst he was slamming away, his hips thumping against her ass I moved to the side and reached under to wank her off whilst he was slamming into her....and was rewarded by an orgasm as she clenched hard onto his cock..... We swapped again, and I slipped my cock into her wet and waiting pussy.....Bob had moved up to her head and had turned her head to the side and was feeding his wet cock into her mouth.....I knew I wasn't going to be able to hold out much longer so griped her hips tight and slammed into her twice more and literally shook ad I emptied what felt like gallons of cum into her.....I moved aside and let Bob have sticky seconds.... As he slipped in he looked at me and I could see he was checking if it was ok to cum in her, which I nodded yes...she had been on the pill for ever and we were all too turned on to worry now....but he didn't really have an idea what I had in mind yet....he was building pace and I could see that he was getting to the edge of his limit in holding back, so I reached under her again, collected some of the ample cum and juices that were running down her thighs on my index and middle fingers and slipped them into my gf's bottom...one and then two as my mate banged away.....her moaning got louder as I finger fucked her ass as my mate continued to fuck her pussy...... When I removed my fingers I pulled her ass cheeks apart so my mate could see her sticky wet bum hole.....I nodded to him and his expression looked like all his Christmases had come at once as he realised that I wanted him to fuck her ass....and about the same time so did she as she pretended to try to wriggle away....all part of the fantasy I knew but my mate paused just in case....so I pulled her further down into the bed, her head went over the edge and her tied hands were pulled up over the back of her head and she couldn't move anymore and I gave one more forceful nod to Bob and he pushed the end of his cock into her bum as I pulled her ass cheeks as wide as I could so he could push his cock all of the way in.....this was the time that the second words of the night were issued when she cried out "you bastards, you bastards...." (again part of the game) as he picked up the pace and fucked her ass.....soon she quietened down into the usual moans and gasps of enjoyment as she took the cock all the way in and was washed away with the pleasure/pain of it...... It wasn't long before my mate also tensed and came deep in her ass....as his cum shot into her he continued to slam hard into her ass...cum was leaking out under the pressure.....but her moans and gasps were subsiding..... After a while both me and Bob left the room and went to the bathroom to cleanup....we didn't really talk about it as nothing else needed to be said....Bob got dressed, shook my hand and left....and I went back into the room to untie my girlfriend and help her tidy up.....to be honest when I went back in she was still laying face down on the bed recovering...I could see the cum still leaking from her ass and pussy so I could not resist slipping my finger into her cum soaked bum...she sighed a little but took the extra attention without resistance..... She went to the shower to clean off and we then went to bed, both sleeping very soundly..... I never told her which of us did what, she may have had her own ideas but that part was never discussed.....although we often reminisced about that evening..... My mate changed job and moved further away and I didn't get to see him very often......we never talked about that evening, as he appreciated that it was a one time opportunity.....