When I got the last piece off I pulled him to the bed and we fell into a sideways sixty nine position. We began sucking each others cocks and I starte... to finger Mark's asshole. Putting some spit on my finger I worked the first half of it in his tight hole. He moaned and spread his legs a little to give me more access. I got up and rolled him over on his belly and pulled his cock and balls back through his legs and started to stroke them while I licked his asshole. He too loved ass play. I. That of ogling my older sister. Melanie always maintained a certain professionalism whenever she saw me at the Library, the only hint that we were siblings being a slight smile that she'd give me as she passed me in the aisles.And that's where things would have stayed, each of us living our own separate lives, Melanie not suspecting a thing while I silently obsessed over her, fantasizing and masturbating to her images until that one fateful day. The day Melanie revealed that she was getting. That night we went back to my apartment, both intoxicated of course, and started making out as soon as we hit the door. I unzipped her bridesmaid dress and she went straight for my pants and pulled out my cock then dropped to her knees and started blowing me. We ended up in my bedroom and had loud, passionate, sweaty sex. It was amazing!We continued hanging out in a "friends with benefits" sort of way and one night while we were 69ing she asked, "Wanna do something kinky?" Hell yeah what do you. "You don't have to, it's ok. I completely understand. Why would 'you', fancy 'me'?" I could hear my own voice, full of self-pity. "Don't be like that, please. It doesn't suit you." Suddenly she seems much older than her years, she's become the teacher and I'm the half-witted and embarrassed pupil. "Please let me explain," she adds, rushing her words. "I want to tell you everything, then maybe you'll understand. You see, like your mum, I was born in Southern Spain. I never knew my father, and I.