I think she possibly panicked when you started asking. Was probably afraid of your reaction, I don’t mean she was afraid like in danger but just wanting to avoid it. Sometimes that is why people lie. Or could be protecting his identity. Like you have rights to privacy but so does he.

Yes much better would be for her to say yes it’s is my husband. But she made a mistake trying to get out of it. I understand why you are upset about her dishonesty (even if it wasn’t done with malice). I mean if I asked hey is it your brother and they said oh no it’s not while it is, I’d feel stupid. Why are they lying. I think it’s reasonable to be upset about that

As about her husband should or shouldn’t be there, I don’t think there is a rule right that. There should be a rule that he doesn’t walk in during your session or tries speaking to you in a waiting room or otherwise violate your privacy. But if he happened to be there I don’t think she broke rules there. I understand you feel jealous but maybe there is a lesson there and something to work on with a t. Sometimes you just have to face it. You could run into them in a restaurant or grocery store. It could happen and it could hurt but that’s life. Could you still be upset? Of course.

Hope it gets resolved