Trapped indoors, siblings turn to each other for comfort. She teases him, stripping down to her lacy bra and panties, rubbing her pussy through the fabric. He responds, his cock tenting his sweatpants. They lock eyes, hunger evident. She whispers, 'We shouldn't...' but her body betrays her, arching towards him. He can't resist, pushing her against the wall, grinding his hardness against her warmth. They stifle moans, their bodies moving in sync, desperate for release.