Incestuous siblings' forbidden masturbation session

Siblings locked in a heated argument find themselves alone and bored together. Their pent-up frustrations lead to secretive self-pleasure, with the brother catching his sister masturbating in the bathroom. The tension escalates, eventually leading to a mutual decision to masturbate openly in front of each other. As the brother's thick, straight cock comes into view, the sister can't help but fantasy it plunging into her tight pussy.

• Unknown