I agree with Logan. In no way is seeing this woman going to be "good for Lolly". Based on what you said, this woman abandoned her furkids with an abuser, to say nothing of what she allowed during the time they were living together. I don't think you owe this person anything except to say that Lolly is thriving under your care. Your supervisor knows you, so she can tell her that herself. I know I am sounding harsh, but that is just how this situation strikes me.