In the soft glow of dawn, siblings stir, awareness of each other's presence growing palpable. The brother's erection tents the covers, drawing the sister's eyes like a moth to a flame. She reaches out, her touch hesitant yet eager, tracing the length of him. He gasps, his body arching into her touch. She leans down, her breath hot on his skin, her tongue darting out to taste him. He watches, mesmerized, as she takes him into her mouth, her lips stretching to accommodate his size. She sucks, her cheeks hollowing, her tongue swirling around his sensitive tip. He grips the sheets, his body tensing as she brings him closer and closer to the edge, their taboo morning play threatening to consume them both.