I had horrendous jealousy and emotional reactions whenever encountering (S's) my ex therapist's teenage and young adult female clients. I didn't have reactions to couples, older women, children, or any male client of any age.

I rarely ran into my other ex-T's (J) clients, but when I did, they were always teen boys. No feelings.

I have never run into C (my current T)'s clients. If I did, I don't know how I'd feel. I don't really think about them. I tend to forget about their existence entirely. It is very obvious to me that C is invested in me, not as a number, but as a person. And, he has made very clear in words AND actions that our relationship involves his genuine feelings and emotions as well..and that he is committed to and cares about me. So, I guess I feel less threatened by the existence of other clients.