The stepsister came to your room again. She seemed pretty excited. You put all your business aside and turned toward her. - Show me how you jerk off,” she said in a whisper. You hesitated for a moment. You often fantasized about you and your sister jerking off while sitting across from each other. You would leisurely race your pelt up and down, rubbing your scrotum, while your sister spread her legs wide, fingering your clit while squeezing your tender nipples. But you didn't expect your dirty fantasies to become reality. - Oh....course, - you answered without any thought. Yes, it was wrong, but damn, how much you wanted it. Pinch me! Your sister says something that makes your cock in your pants get insanely hard and big. You sat down in the chair. Slowly, as if trying to delay the inevitable, you unbuckled your belt, then your fly, and pulled your pants down. The moment of truth! You took out your cock, clenched it in your fist and began to massage it slowly. You tried not to look at your sister, and you tried not to look at her at all. Your sister saw that you were a little embarrassed. She smiled playfully and began to undress slowly, provoking you and motivating you to continue and not to stop. You slowly began to run your hand down the shaft of your penis, taking hold of your testicles, while your sister was already naked on the bed and stroking her wet clit. Neat, slightly swollen labia spread apart, exposing the pink clitoris and the entrance to the vagina for your pleasure. You couldn't watch this picture for long, so you pulled her against you and fucked her hard until you cum together in unison.