In the dim light of their shared childhood bedroom, the siblings' breathing grows heavy as they each slip a hand under their clothing. The sister, her eyes closed, imagines her brother's strong hands on her body, his cock buried deep inside her. Her brother, his breath hitching, pictures his sister's full lips wrapped around his shaft, her tongue teasing him. Their hearts race as they edge closer to release, their minds filled with the most intimate, forbidden images of each other. As they come, their bodies shaking with pleasure, they know they've crossed a line, their incestuous desires awakened and impossible to ignore.