Wow, I can see how it would even feel mean to try to stop such a kind gesture. I wanted to do that with my dog; it seems like the best of both worlds. Volunteering while having everyone love my dog. Whether her dog really could be a therapist dog is a different matter.

Just the same I would bring up to her--in the very least threatening way possible--that it might be better if you were to change therapists under those circumstances. I'm sure she's been trained about dual boundaries. The upshot should be that she realizes what her main responsibilities are.There must be other places she could bring her dog if it really does succeed as a therapy dog. Mine didn't enjoy it.