Under the covers, a brother and sister awaken to the promise of a new day, their bodies already primed and ready. The sister, her breath hitching as she feels her brother's hardness against her, tentatively reaches out to touch it, her fingers tracing the outline of his cock through his boxers. He responds in kind, his hand sliding up her thigh, finding the heat of her pussy through her damp panties. They're silent, their breaths coming in soft gasps, as they learn each other's bodies in the quiet of the morning.