The siblings, haunted by religious guilt and pent-up lust, find themselves in a desperate, cramped space. Michelle, her eyes filled with conflict, takes her brother's massive, untouched cock in her hand, whispering, "We shouldn't..." as she strokes. Their father's voice, distant yet commanding, "You mustn't!" only fuels their desire. With a whimper, Michelle guides her brother's cock to her soaking entrance, impaling herself on his virgin length. They move tentatively, then with growing urgency, their bodies slapping together, voices mingling in chorus of sin and pleasure.