Slippery and steaming, the siblings' bodies press together under the cascading water. Her hands roam, exploring the hard planes of his chest, while his grip her round ass, pulling her hips against his throbbing erection. Their lips meet in a fierce, hungry kiss, teeth clashing, tongues dueling. The shower stall echoes with their moans and the slap of wet skin on skin. They're lost in the moment, their bodies craving more, until a sudden knock at the door jars them back to reality.