I don’t think one needs to be a therapist to be able to discuss how something effects someone else. You often say because she is not a therapist she can not understand or discuss something. It’s not a big mystery. I find it curious that you feel this way. Ton of people in all kind of professions can understand and discuss how other people feel. Not just therapists. What if you bring it up?

It’s hard to tell when someone is upset about something. Especially if you need to appear certain way at work. It would be unprofessional for her to appear visibly upset. I rarely look visibly upset but it doesn’t mean I am not.

If you don’t want her sharing, it’s ok to change the topic and talk about yourself instead