Isabél

I go back to rubbing her buttocks, those curves, they are so lovely to touch. She quickly picks up the pace of the vibrator. No warm-up is necessary, she is extremely excited. She twists and kicks under me, moaning and groaning like an athlete pushing herself hard towards the finish line. But she is not getting there. For what feels like an eternity, she is wriggling under me, while I rub, knead and caress her buttocks, so close to the orgasm, yet somehow she can't make it the last bit of the way.

Somehow I know what I have to do. I stop my rubbing, lift off my hands, then put a very gentle slap over her red ass. It jolts her whole body, and she lets out a sharp, short scream. I begin to slap her continuously again. Her back arches, as if someone put electricity through her spine, and then the scream from my fantasy becomes real as a massive orgasm erupts through her. It subsides, but doesn't die out, more like a wave retracting from the shore, only to return with greater strength. I continue to spank her as the second orgasm runs through her and retreats. And then the final wave hits her, a tsunami, an earthquake shaking her deepest foundations, leaving her body limp, exhausted over my lap. I finally stop the spanking, and remove the vibrator as she turns it off.

She lies still across my lap for a long time. My own breath is heavy, and I am shaking all over. She finally gets up on uncertain feet, pulling her panties and tights in place with slow, uncertain movements, as if everything has to be learned anew. She looks at me as if one of us should feel guilty, but I cannot exactly make out who it is.