Why is it that when I'm content and think things are going well that a woman starts causing trouble in a relationship?

This has happened more than once. I want to have a good time and chill and she thinks it's some sign of weakness or something and starts testing me and then I just had enough. Is it that difficult for a woman to just be happy? Or what amd I doing wrong? I'd be grateful for advice.

Why is it that when Im content and think things are going well that a woman starts causing trouble in a relationship?
Why is it that when I'm content and think things are going well that a woman starts causing trouble in a relationship?
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