We weren't really sure where it would lead. She had loved camming with her various guys, and little by little I got used to it , and then got curious. She used to tell me about it , or record videos of herself playing with toys for her play-friends. I have to be honest seeing her cum like that while imagining being taken by various guys was a huge turn on. And so it was we started thinking about the next step. For me the next step was seeing her kiss a girl, and seeing where that took us. She had loved that the few times she had done a drunken fumble, so was pretty excited about the whole idea herself, and thats how we ended up at the club. We started pretty slowly, just checking out the scene , and then graduated to the naked hot tub. This surprisingly was no big deal. She sat opposite me, between two guys, with limbs and legs all overlapping. It was difficult to see where hands might be, but aside from the casual stroke here and there I would have noticed if things had gone further. There was a young hot friendly girl on my left, and brushing her thigh was making me excited and distracted. All the while, making casual conversation was a challenge. My girl got out, showered slowly in front of the watching men, and went downstairs to get a drink. I followed some minutes later, and by the time I got there, she was chatting to a couple, just wearing a towel and had somehow become a lot more lubricated and frisky than earlier. I went to the bar, and by the time I came back, she was kissing the guy, her large breasts pressed against his chest and her face flushed. I watched, unsure whether horniness or jealousy would come over me, but when she reached for his cock, his girlfriend dragged him away. "I am so fucking horny", she said, her eyes glancing around the room and alighting on a young guy nearby, also just in a towel. "Do you mind if I just kiss him"? I paused to answer, but before I did she had already asked him to kiss her, and as he did she climbed onto his lap, straddling him. They started making out, his mouth intermittently on hers, with his ravenous tongue licking her. She knelt up, raising a nipple to his mouth, and letting her towel slide to the floor. Her left hand was reaching under his towel stroking his hardening cock. She rubbed it against her pussy, sharing their lubrication, and then pushed herself down on it. He groaned as his penis slid into her and she began to ride. She was panting hard, enjoying the people watching, and the way his cock felt inside her. I knew she wouldnt last long as her breathing got faster , and when she came, she came long and loud. She lay back on the sofa, and pressed his face between her legs. I knew from before, that she liked a second orgasm from oral if she had really enjoyed the first. She beckoned me over and we kissed while her lover slowly built her second orgasm. She lay there panting after. We sat there, uncertain of each other, until I got up to get her a drink. When I came back she was missing. It took me some minutes to find her in the pool, kissing and fondling with the first couple. I climbed in but didn't join, as noone invited me. She was clearly stroking his cock under the water now. At this point the other guy came back , ostensibly to say goodbye. However, she tugged his towel away, and kissed his cock hard. She mounted the guy in the pool, and shoved the other cock in her mouth, fucking them both together. I could feel the other girls hand slide over to check whether I was hard, and then she mounted me backwards, so she could watch her boyfriend with my girlfriend. He came first, hard, in her pussy, but she kept him pinned down until the other guy came in her mouth. The other girl took my hand and guided us out of the pool to one of the glass-fronted bedrooms, and there we fucked while everyone watched. It was only as we left the club, some time later, that my slut of a girlfriend said "I only did that for you". I am not sure that is really true though.