Threesome with a difference

i have been seeing a girl from our office she loves to flirt and alwayslooks sexy but business like, we have had a bit of a snog and grope at a business do but nothing more until last weekend, Deb was invited to a party and invited me i picked her up at her flat and my eyes almost popped out of my headshe wore a shortblack skirt and a silver coloured satin top, the skirt was tight and showed off her cute arse the top open enough to show plenty of cleavage. The party was at a big posh house with swimming pool and acres of land, the party was in full swing when we arrived the booze was flowing and people seemed to be having a good time, there were plenty of good looking people around some of who were introduced to me, one couple jenny and peter in particular jenny had a dress on that defied gravity as it had little front and no back, as the the party wore on deb and i flirted more and more with each other as we danced i rubbed her arse and she pushed herself on to meshw wispered in my ear "take me up to a room" I didn't need to be told twice we entered a room and deb turned and kissed me my hands were all over her body i lifted up her skirt and found she was wearing a tiny black thong and holdups she undid her blouse to reveal matching bra before she wipped it off to show her great tits, i was bear chested in a shot as she pulled my belt open unzipped me and sucked on my now rock hard cock i moaned with pleasure and enjoyed her work, I lifted her onto the bed and pulled her thong to one side exposing her bald pussy, as i was tonguing her i heard the door open and saw jenny and pete enter they giggled and closed the door i saw them groping and fondaling but stayed focused on what i was doing, deb turned over so she was sitting on my face i licked as she writhed i then felt a mouth around my cock expertly flicking and sucking every now and then my balls (which are nicely shaven0 were licked and sucked I was nearly comming when deb came on my face wtithing and moaning as she did she lifted herself off me and i saw it was pete who was sucking my cock and jenny was in a chair rubbing her very wet bald pussy deb kissed her as i came in petes mouth ....it was my first time i had experienced such fun but not the last especially with jenny and pete