Did my wife cross a marital boundary?

Marriages has its ups and downs. Right now my wife and I are having marital problems. One of her closest friends is a male coworker. I found out she has been running to him and discussing our marital issues. We’re in our mid 30s with little kids. Her friend is a couple years older and single. To me, she shouldn’t be discussing our problems with anyone else but me. It opens up outside influences. If we discuss things it should be between us or a marriage counselor. Call me insecure but I feel like she’s not protecting our marriage by doing this. This is how emotional/physical affairs start. By leaning on someone else. She doesn’t think she did anything wrong.

Did my wife cross a marital boundary?
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