In the dim light of the closet, their bodies press together, the heat of their skin palpable through their thin, damp clothes. The younger sibling's cock stirs, straining against his briefs, while the older one's breath hitches, her nipples hardening against her bra. Their hearts pound in sync, and their bodies sway, drawn to each other like magnets. The older sibling tentatively reaches down, her hand wrapping around her brother's throbbing shaft, feeling its pulse through the cotton. He lets out a soft moan, his head tilting back, giving her access to his neck. She leans in, her lips brushing against his skin, igniting a spark that threatens to consume them both.