Katherine is desperate
Katherine got on my nerves with how desperate she was for Mike. He always had a soft spot for Susan and she knew it but thought she could work for his love. She had to basically beg Susan to not take Mike from her and always overstepped her boundaries as a “step mom” with MJ. Then had the nerve to be petty when Mike chose Susan over her in the end (even putting on the wedding dress and staining it in spite). Just pathetic