Sister and brother find themselves in a tense standoff, their faces inches apart, breaths ragged. The brother's cock, thick and hard, tents his sweatpants, betraying his arousal. The sister, her eyes locked with his, reaches out, her hand wrapping around his shaft. He gasps, his hips bucking forward. She smiles, a wicked glint in her eye, and drops to her knees. She takes him in her mouth, her tongue swirling around his sensitive head. He groans, his hands fisting her hair. She sucks him hard, her cheeks hollowing, her hand pumping his shaft. He fucks her mouth, his hips moving in short, sharp thrusts. The room fills with the sound of their wet, sloppy kisses and his strangled moans as he unloads into her eager mouth.