Tiago, the pious brother, can't resist the allure of his sister's innocent charm. As she prays, he watches, his cock twitching in his pants. When she catches him, instead of anger, she feels a forbidden desire. Tiago, with his thick, veiny cock, is more than she's ever seen. She can't help but imagine it inside her. Their religious guilt builds, but so does their lust, leading to a heated, taboo encounter.