Exactly. This is why there are rules about these things for mental health providers.

To me, it's less harmful to say, "oh, yeah my partner is a soccer guy too. So I know how consuming it can be," than it is that OPs therapy time has been used to discuss the therapists personal life to any extent.

I find it concerning that you know anything at all about your therapist's partner. Your therapy relationship and time are supposed to be about you 100%. Any sharing of personal info by the therapist is supposed to serve a therapeutic purpose.

Also it's not entirely appropriate for your therapist to introduce you to her partner in the street, as it creates a high likelihood of HIPAA violation, this probably was a violation if she indicated in any way that you were her client.