Im 23,size 12, 34ff about 5ft8 and short red hair I do have a boyfriend but he's in the forces and away most of the time. I h ave a good job in accountancy and have my own place and a good social life. Im not a nun so dont stop in all the time waiting for my boyfriend to come home and when it suits shag a guy if i fancy him and im sure my boyfriend is the same, we have a good sex life when he's home and im more than obliging in the bedroom. I go out most weekends and some times stay over at a friends house, which is her family house which she shares with her parents and younger sister. when I stay I share a double bed with my friend we are normally pissed and just sleep. So on this occasion a Saturday night I stayed over we went into town had a great time,dance lots of flirting with guys and lots of drink. Jan had work the next day and had told me her parents were away so just her younger sister was in the house so to chill in the morning as she wouldnt be home until late afternoon. Jan got up in the morning I watched her getting dressed having improper thoughts lol but just went back to sleep. Ashort while later I heard the door open but pretended to be asleep, it was Jan's younger sister Rosie who's 19 about size 8, 34b short cropped black hair and quite attractive. I could see Rosie looking at me but still pretending to be asleep, Rosie sat on the bed and stroked my hair and gave me a little peck on the forehead. I continued to pretend being asleep but moved so the covers moved off me slightly leaving my breasts exposed. I could feel Rosie's warm breath next to my skin I still didnt open my eyes but was really excited inside, Rosie slowly fondled my breasts and very gently sucked my nipples which responded accordingly my nipples were rock hard and ached through sexual pleasure. I couldnt pretend any more I opened my eyes and smiled. Rosie was so embarrassed and apologised and said please dont tell Jan. I said its ok and kissed her tenderly and loving with my tongue entwined in hers, our tongues teased each others lips for what seemed a lifetime. Rosie kissed my neck very provocatively and had me soo turned on I was soo wet and wanted her she teased my nipples with her tongue and started to bite my nipples I was groaning with pleasure. She had beutiful pert tits and I chewed on her little nipples which were very taut,Rosie kissed me and started to probe my pussy with her fingers really excited because she had made me so wet. We layed with our wet pussies pushing against each other grinding it felt so perfect kissing and our pussies gyrating against each other. Rosie and I had the most amazing orgasm, we moved into the 69 I was on top Rosies pussy tasted so gorgeous I couldnt get enough Rosie was licking my pussy and tonguing my bum hole we changed position so i could return the favour we ate each others pussy for ages and had at least 3 orgasms I had never had as many orgasms with a guy. we showered together kissing and fondling each other and tonguing each others pussy, Rosie tasted devine I didnt want this to stop. We went out for lunch and behaved like lovers with only eyes for each other after lunch we went back to bed and made love again Rosie told me she had wanted me for so long I felt fantastic and wanted more of Rosie.