"Let's make a bet," Jem whispers to her stepbrother, their eyes gleaming with mischief. They wager on who can make the other cum first, right there in the bet-room. Jem's fingers dance over her panties, rubbing her clit, while her brother strokes his cock, his eyes locked on her wet panties. The room fills with their heavy breaths and the sound of wet fingers and cock. Jem wins, her orgasm ripping through her, her panties soaked. But her brother isn't far behind, pulling out and cumming in her panties, the fabric stretching taut against her pussy as he fills it with his cum. They collapse, panting, their bodies glistening with sweat and cum.