I don’t think she could drop you even with a referral without making it to look like an abandonment. So I think if you want to end it, it should be you.

I’d worry about how you feel and not how she feels. You aren’t each other’s therapists. Yes she could feel hurt on clients behalf or feeling hurt by clients actions but it’s still her job. I don’t believe her feelings need to be your concern. She can figure it out or ask advice in supervision

If this is too much and you find difficult to tone it down, take a quick break. Maybe few weeks?