The devout siblings, bound by religious constraints, attempt to verify their brother's virginity in a cramped closet. They're haunted by guilt as they push his massive cock inside, their bodies betraying them with lubrication. The girls soon give in to their taboo lust, licking and enveloping the penises, only to collapse into post-coital remorse amidst smeared juices and spent fluids, praying for absolution.