As the blizzard rages on, the siblings succumb to their primal desires. The brother's hands roam over his sister's curves, his fingers tracing the outline of her pussy through her pants. She grinds against him, her breath hitching as he finds her clit. He unzips her, his cock springing free, already hard and ready. She takes him in her mouth, her tongue swirling around his shaft. He lifts her up, impaling her on his cock. They fuck hard, their bodies slapping together, their cries of pleasure drowned out by the storm. They cum together, their bodies shaking with the force of their orgasms, their juices mingling as the storm finally begins to abate.