Clean her up a bit.

You walk to a hose coiled around the hook on the wall and unwind it, pointing the end of it towards Gemma. You turn on the tap and send a blast of cold water all over her body, spraying her down and washing her dried bodily fluids down the drain in the corner. She's completely unexpecting this and flinches as the water hits her - knocking her off balance. For the next few seconds, she wildly tries to regain her center of gravity as she swings back and forth, swiveling on her toes as the rope pulls painfully against the hook in her ass and her wrists from all directions. You spray her down for about a minute, before turning off the tap and hanging the hose back up. Water drips off her body as she finally balances herself, although the water at her feet makes it difficult for her to maintain it.

You walk to the workbench and pick up a black riding crop, fingering the leather tongue between your fingertips, and take up position behind her. The room echoes with a crack as you whip the crop across her ass. Her rear and thighs are already covered with a variety of red marks and bruises, both old and new. You whip her ass for a good five minutes, leaving fresh red lines all over her firm cheeks, as she struggles to hold still to stop the painful hook in her ass stretching her sphincter even more. You can hear faint groans, but the dildo gag lodged in her throat blocks most of the sound from coming out. You go the front and whip her tits for a few seconds, leaving long crimson marks all over her, before tossing the crop back onto the table.