The door creaks open, and in walks Katrin52's stepbrother, catching her in the act. Her eyes widen, but she doesn't stop, her hand still moving, her pussy still throbbing. He watches, captivated, as her body responds to her touch, her wetness coating her fingers, her clit swollen with need. The tension between them is palpable, the air thick with the scent of her arousal, a testament to her caught-in-the-act masturbation.