Isolated together, siblings Juan and Maria find themselves drawn to each other, their desires intensifying with each stolen glance. One fateful night, as Maria walks in on Juan masturbating, their secret longing becomes undeniable. She watches, entranced, as he strokes his thick, veined cock, before dropping to her knees to take him into her mouth. They explore each other's bodies, their taboo passion escalating, until they're consumed by a fiery, incestuous fuck that leaves them gasping and guilty.