If you're implying she did something to cause his lack of trust, fuck off. It's entirely possible to have fears of abandonment and betrayal absolutely consume you until you do something absurd without the partner having done anything after all. I'm in therapy for massive abandonment issues stemming from family shit that happened years ago. I still freak out if I detect the slightest hint that a friend or loved one is potentially mad or annoyed at me. And I hide in my room until it passes, I don't go hiding in people's fucking closets.