Finish her off.

You reach up and detach the showerhead from its mount and bring it between her legs. She gasps as you flick the switch on the head to the massage setting, and aim it directly at her clit. She begins to fuck you back, the motion of her hips matching the rhythm and tempo of your cock. Her eyes flutter, flirting with the edge of unconsciousness as the pressure in both her holes and on her sensitive button starts to overwhelm her. She begins to hyperventilate, and her moans turn to wheezes and rasps as she struggles to get air both in and out of her lungs.

You rip your thumb out of her ass, drop the showerhead onto the floor with a clatter, and grab both of her wrists, pinning them behind her back. Water sprays wildly all over your feet as you slam your cock into her deeper than you've ever done before, each thrust lifting her feet up off the ground and into the air. The only thing holding her up is the weight of her face and tits pressed up hard against the shower wall. You time it all to perfection, with the rush of your cum erupting inside of her just seconds before her own climax detonates throughout her entire body. You collapse on top of her, and the mirror on the wall vanishes behind the cloud of steam that has enveloped the room, and with it, the reflection of her body smashed against the glass...