Sinsic's sister, a holy roller with a secret sinful side, finds herself alone with her stepbrother, their parents away. As they pray together, her wandering eyes catch his bulge. She can't resist, sliding her hand into his pants, feeling his hard cock. He resists at first, but her persuasive tongue and eager hands soon have him rock hard. She gives in to her desires, riding him reverse cowgirl on the family altar, her moans echoing in the sacred space.