The jeans-clad siblings lock eyes, their breath hitching with anticipation. She, in tight denim, straddles him, grinding her crotch against his, feeling his hardness through the fabric. He reaches around, cupping her ass, pulling her closer. She moans, her body arching, as he unzips her jeans, slipping his hand inside to find her wet, ready pussy. Their jeans-clad bodies slap together, the denim rubbing against sensitive skin, as they fuck, their pleasure building, until they climax together, panting and sweaty, still half-dressed.