Tracy and I have been together for some time now and have had on off affairs with others, we're both bi and love to play not always together, one saturday afternoon tracy had gone over to see her friend Laura who had recently moved house and was busy putting things in there place, Laura worked with Tracy and had swapped a kiss on a drunken night out but nothing more so both Tracy and I had never thought more of it, although Laura is divorced she kept herself to herslf. Tracy had been gone for three or four hours when she called me and asked if I'd help shift some of the more bulky furniture I halfheartedly said I would as I really couldn't be arsed, I said I go over in awhile, I was told that the back door would be open as they were shifting stuff about and throwing the rubbish out the back. I did eventually go over and went in via the backdoor, I called out but heard no reply as I started to go up the stairs I could hear moaning, feeling randier as I went I slowly crept up the stairs the main bedroom door was ajar and I could see Tracy on all fours getting fucked by Laura with a strap on, Laura was still wearing her knee high boots but that was all and I'd never realised how big her tits were as she always dresses conservativly, tracy was totally naked and by the looks of things loving every moment, as I was standing there rubbing my stiff cock, i shifted my weight and the floor board creaked, both of them looked at me, Laura looked shocked but gave me a real horny look as she continued to ram home that strap on cock Tracy just looked lustfully and said "get here, give me that cock" I didn't need asking twice, I pulled off my top, kicked off my shoes and had my jeans off in a flash, Tracy rubbed my now rock hard cock and sank her mouth over the head teasing me with her tongue, Laura leant forward and kissed my hard on the lips, flicking my tongue, I'd seen Tracy get fucked by another fella but this was so fucking horny, I was fucking Tracys mouth as Laura fucked her pussy I was close to cummin when Laura told me to get her in a 69 position, I rolled Tracy over and straddled her so I could continue to fuck her sweet mouth, her pussy was soaking as she had had at least three orgasms, Laura was wanking my cock into Tracys mouth when I felt her probing my arse, in an instant she had her strap on right up my arse and started to fuck me hard, I was in extassy her long hard strokes filling me, I couldnt last any longer and shot my cum into Tracy's mouth I pulled forward and felt Laura's cock slip out of me Tracey pulled Laura down and kissed her swapping my cum as the kissed. That afternoon lead into a very busy weekend....