In the dim light of their shared bedroom, a curious sister can't help but sneak glances at her brother's growing erection. As he sleeps, she tentatively reaches out, stroking his length, feeling his warmth. He awakes with a start, catching her hand on his throbbing cock. Instead of recoiling, she leans in, whispering, "I've never seen one like yours." Their eyes meet, and a spark ignites, leading to a forbidden, passionate encounter.