Lady Karame did not want to physically punish this guy. He was an abhorrent person and she felt that to tame him permanently, she had to do something that would have long term effects. That is why she chose to destroy his ego and make him doubt himself. She made fun of him and made sure he cried and felt like a small person especially because of his tiny penis.
Mistress Cat searched the entire house for things to crush and destroy and she felt that this keyboard was one of the best things she could crush and not regret. She wanted to enjoy crush fetish as she had just found out about it. She did not want to procrastinate on it so she threw it down and she used her high heels to crush it and destroy it. She made a mess on the floor as keys got thrown all over.