The brother, in a fit of arousal, pins his sister against the wall, his hands gripping her firm ass. He grinds his cock against her, their moans echoing in their shared room. She begs for more, her body aching for release. He obliges, sliding his hand into her panties, finding her wet and ready. He finger-fucks her roughly, making her cum hard before he finally gives her what she truly wants - his thick cock, pounding into her tight pussy until they both explode in ecstasy.