The siblings, haunted by religious teachings, attempt to maintain their purity but the temptation is too great. They're drawn to each other, their bodies aching for release. The brother's cock, massive and untouched, throbs against his sister's thigh as she straddles him. She's never felt so full, so stretched. They move slowly, tentatively at first, then with growing urgency. Their breaths come in ragged gasps, their bodies slick with sweat and sin.