Trapped in the closet, the siblings' breaths mingle, their hearts pounding with a mix of fear and excitement. She can feel his erection growing against her, and he can't help but imagine the feel of her untouched pussy. With a whimper, she reaches down, gripping his cock through his boxers, while he slides a hand up her thigh, making her gasp. They're playing with fire, but they can't stop now.