How does he react?

He's horrified by the idea

"You're rejecting me?" he said in terror. "I thought you loved me?!"

"What?!" said Anna.

"I thought you loved yelling at me and insulting me?"

"Well," Anna couldn't deny how good it felt to belittle this grovelling maggot. "I guess I kind of do, but maybe that's not a good-"

"You know how much I love your tender ****! You know how much I need your sweet insults! Every night I masturbate to thoughts of your incredible dominance, and the ecstasy is incredible! Why are you doing this to me?!"

"I, I, I didn't mean to! I just thought that things could be better!"

"Better?!" He slid off the bed, falling back into a kneeling position in front of Anna. "Nothing is better than the direction you give me! The sweet assurance that I can always make you happy! I love the clarity of knowing my place under your heel, and you've always told me that you love putting me there! Is that not true anymore?"

He put his hands together and begged. "Please, please, don't do this to me! Let me be your worthless **** forever!"