Michelle, the younger sibling, is a picture of innocence, her eyes wide with curiosity as she watches her brother's body react to their proximity. His cock tents his pants, visible even in the dim light of the closet. They're both frozen, aware of the taboo nature of their situation, yet unable to move away. The air is thick with tension, and Michelle can feel her own body responding, her heart pounding and her breath coming in short gasps.