This wasn't the first man that wasn't mesmerized by her breast. Madame Illusia had Damon under her spell.
Every time a man approach her. They would stare at her breast and drool like idiots.
Damon was just another perverted man who only like women for their breast size. He has proven that to her.
There was only one animal that suits him. A Pig. A most suited form for Damon. He was no different.
Madame Illusia pull out her wand. "I think Damon here has proven what kind of man he is. A man who likes women for their breast."
She cast a spell on Damon. "Aaah squeeeal." Damon suddenly squeal as Madame Illusia continues to change him.
"A man like him should become the perverted pig he is destined to be." A puff of smoke appear around Damon.
When it clear. A pig stood where Damon use to be. "Stephen. Take our new pig to his new home."
Stephen then takes the new pig off the stage. Now she has to deal with Monica.