She is wonderful, feisty, motherly, and kind. However, she still had contempt for her son's safety and allowed him to be home alone on a few occasions in order to work.
- "Don't get smart with me, Alex. Sick or not, I am very angry with you. You have caused a lot of trouble today."
- "Alex what's the matter with you, you don't get to disconnect one of my calls!".
- "I'm sorry I didn't listen to you". Karen to Alex after realizing that he was telling the truth all along.
- Her hair color is the same as Kevin's mom in the first two and fourth films.
- She drives a 1989 Ford Taurus estate in the film.
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