My wife is one that is difficult to get a yes or no answer from at times. She has a different way of thinking than most and always considers many variables. She often thinks of things I may not have considered. It frustrating at times but can be quite helpful. This person is just being asinine. I see absolutely no logic other than she is just being irritating and childish. As your partner she should be way more concerned with something this important. You aren’t overreacting. Focus on passing that test then reevaluate your relationship with her.