In the second installment of Wildow666's explosive masturbation series, a brother and sister, both horny and alone, decide to satisfy their urges together. She strokes her clit, her body squirming as she gets closer to climax. He watches, his cock hardening, and can't help but join in. Their eyes meet, and the tension between them grows palpable. They're about to cross a line, but the thrill of the taboo is too much to resist.