Her head and wrists are fastened to a post as her ass is presented for punishment. The good kind of punishment. Her ass is covered in trails of whip tips before her pussy is clamped and spread open for penetration. She can either endure being fucked or enjoy the tug and shake of the clamps. It's up to her at that point.
Here comes the breaking point. She is bent back by the throat and pressed tightly at the back, creating an orgasm inducing discomfort.