Two siblings, both religious and repressed, find themselves alone in the house, their bodies betraying them with forbidden desires. As they try to maintain their virtue, their clothes grow tighter, their breathing heavier. The brother's massive cock tents his pants, while the sister's nipples harden against her blouse. They try to resist, but the temptation is too great. They begin to touch themselves, imagining each other's hands on their bodies. The sister's pussy drips with desire as she rubs her clit, while the brother strokes his thick cock, fantasizing about plunging into his sister's tight, untouched cunt.