In the dim light of the closet, Gaigoi's eyes gleam with forbidden desire as she gazes at her brother's bulge. She's been fighting her kynu urges, but today, they're too strong. Her breath hitches as she tentatively reaches out, tracing the outline of his cock through his pants. He sucks in a breath, his body tensing, but he doesn't pull away. The air thickens with anticipation, their hearts pounding in sync, as they teeter on the edge of taboo.