I've been in an exclusive relationship with a woman for two months, known her for seven. The sex is great, and she's nurturing, caring, and consistent in her behavior. Communication is open, and she’s forthcoming about her plans. We're currently in a long distance dynamic but she's moving here next month.

The issue: She’s been vague and inconsistent about a male co-worker. Months ago (when we weren’t exclusive), she mentioned going out with colleagues and described this guy as a family man in his 40s. Recently, she said she was going out with "girls and one guy" when I asked if it was the same guy, she said yes but corrected herself from "40s" to "30." Later on the phone I found out he's not married like she claimed, and she said we were probably talking about another coworker. (I am sure this detail was a lie, but why she lied is up for questioning).

I also found out she hasn’t told her colleagues that she’s in a relationship. She downplays her relationship with colleagues a lot. But I saw she talks with this guy outside of work (exchanging Instagram videos). Contradicting her claim of not talking to them outside work, she’s even left her cat at his place when visiting me 2 months ago.

Given how open she is otherwise, I am contemplating whether this is a serious concern or just plain overthinking? Especially since I don't understand why she's doing this as her behavior hasn't changed in the slightest.