While growing up my step-sister would always ask to cuddle with me, I always said yes as she was very cute. As we both grew up there always was a sexual tension. When we were both in college she came to my place for a party and I said she could crash in my room and I'd sleep on the couch. As we all partied my step-sister was flirty with some of the guys and it was extremely hot to watch. She was a college athlete so her body was very well shaped, curvy hips, beautiful boobs, pretty face. As the last parties were leaving she whispered to me, "I want to cuddle like we used too!" I was already turned on from watching her flirty and tease those guys and when she said that I grew instantly hard. We went to my bedroom, I went into the bathroom and got my sleep shorts on and no shirt. She then went in, while she was changing I crawled I to bed with anticipation, she came out with a tank top and just a thong on. Her body looked amazingly gorgeous as she crawled into bed with me and snuggled up against me. I wrapped my arms around her and she scooted her booty into my hips, I was rock hard pressing back against her. I matched my breathing with hers, she felt so amazing. She took my hand in hers and placed it on one of her boobs. I gently started massaging it, she softly moaned and I took that as an invitation. I moved my hand down to her hips and pulled her more against me and I pressed my hard cock against her even more. She moaned louder and said "I can't take it any longer" and turned over facing me, she then said "we've been working g to this point for years," and she reached over and started rubbing my cock. She pushed me onto my back, straddled me and we started making out. It got pretty intense as we moved further into our lust, giving each other mind blowing oral, and we fucked each other into squirting orgasms. We then went to slee Nothing has happened since. There is always a potential of it happening again and I am sure hoping so.