I stood up, checking on her reaction. She pushed back her chair and rose to meet me. Grabbing her head, I planted my lips on hers and set my tongue fr...e. She tasted strongly of my dick and semen. We were kissing like a****ls, frenzied, sucking, biting, licking, grabbing each other in all sorts of ways. My hands dug into the glory of her behind, sliding up the skirt (which was some work because of its tightness) and finding her ass cheeks naked under it. No sign of a slip. I grunted with. . "Katelyn... Katelyn?"I blinked and looked up to find the whole class looking at me and Mr Harrap leaning casually against his desk with a quizzical look on his face."What?" I whispered." We lost you there for a minute, I was asking how the male genitals are different from the female genitals." As in one is a cock and the other is a cunt?" I answered with wide-eyed innocence.The whole class took a simultaneous intake of breath but Mr Harrap looked unfazed except for the tiny tale, tale pink. We kissed delicately, a kiss which escalated fast. Within moments we were making out , desperate for each other. Tongues swirling , breathing fast. Taking a split second break, she gasped "do it." I obliged, sinking my dick slowly into her pussy, feeling the walls expand. she gasped and stretched, whilst pulling at me, as I slowly entered her. Soon I was in to the hilt. We both sat still, brother and sister savoring the feeling of her warm pussy. Fuck me now, never mind anything else, just stuff it in me.’ She crawled off me and knelt on the edge of the bed, her rump raised, legs wide apart. As I stood and dropped my chinos I could see her cuntlips, dripping and shiny, straining wide, waiting for me to split them. My cock was painfully hard and I let my boxers fall and shuffled forward, nearly stumbling over my pants. She twisted to look at me. ‘In, straight in,’ she panted, and I set my cockhead at her slippery entrance and drove.