Yes, make it that she can only crawl

With another rub of the Reality Marble, you make toned posterior become bulbous and exaggerated. Then you shove her off your lap, to let her discover that she is now unable to support her fat ass with just her measly feet. As she struggles to stand, you slap her breasts and watch them swing back and forth like pendulums, as she lets out another shriek of protest and arousal.

"No one will ever take you seriously again..." You inform her. "Where once was a great leader, a legendary hero, a powerful spell caster...now is just a slut too ridiculous to be useful for anything except a good fuck."

You smack her massive ass and she shudders in pain, letting out whimpering calls for mercy. You kneel down behind her and grab a handful of each, ginormous cheek. Then you begin fucking her puffy, pink asshole. She lets out a scream and bucks wildly, but her body is no longer athletic or toned, but soft and weak.

Eventually, she gives up, and sobbing at not only the pain of your penetration but also at the smack of your hips against her thighs she lets out the following.

"Pweathe hab merthy!" She begs.

You laugh and decide to play a little game with her.

"Alright Kiki, deep inside this whorish body there's still a whimpering bit of psyche...so, tell me, would you rather I throw you out of my palace and leave this disfigured, buffoonish form to the mercy of the men and women who you failed, when you allowed me to win? Or would you rather serve as my ****, and not face daily **** and certain starvation?"