Being a healthy 17 year old I was always horny anyway but my sister’s body sent me to a whole new level. I had girlfriends and dated but I never fou...d any one I really wanted to go steady with. I had sex only a couple of times and it was always with some cheap slut from high school that would get drunk and fuck the guys at a party. I never really had sex with foreplay and it certainly never lasted more than ten minutes. It’s hard to take your time when there are several guys waiting in line to. "I can't see that you even have a cock under those clothes. The way you're dressed it's obvious that you should be giving them."Her hand reached down to my crotch and she dug her nails in to my shaft. I yelped in pain as she pulled me up till I was teetering on my tiptoes. She leaned over and softly kissed me, gently, but firmly melting me with her tongue. When she broke the kiss she tied me over the horse. My legs were spread to the horse legs and my arms bound to the other side.My dress was. After a few weeks of this I decided to follow her to work to see what was going on. She drove to work like normal parked up n went inside. I parked down the road and made my way to a spot I could over look her work without being seen. After a couple of hours of nothing a delivery van showed up and park in an unusual place as it was away from the front door of the hospital and with its backdoors towards me. When I saw the delivery guy get out of the van. It clicked he must of been 6ft2 and very. She begged him to fuck her. He obliged, pushing his huge dick into her waiting hole. The feeling of his cock inside her was amazing as he pushed deeper. The movement of her clit jewellery during intercourse provided some extra clitoral stimulation as Kieran pounded her harder and harder.Sweat was running down their bodies. Kieran flipped her over, then pushed his cock back in. He caressed her tits as they fucked doggy style. His hands then went down and gripped her hips as he slammed into her.