Tucked away in their shared room, the siblings can't resist the temptation. She's on all fours, her cuzinho up in the air, as she plays with her brinquedinho. He watches, his cock hard, before joining in. He spreads her cheeks, his tongue exploring her tight hole. She moans, pushing back, wanting more. He gives it to her, his cock replacing his tongue, fucking her hard and deep, just like she asked.