this is potentially the last social identity you have to create.
..as long as you stay centralized on the central BlueSky instance. Once you move out to a (potential, future) federated server, that identity (and it's super duper verification) doesn't follow you.
Tell her to stop. Then cease all contact. No need to be respectful. It’s not a situation that needs fine granularity.
You are the adult in this and it’s always going to be your responsibility to do the right thing. So act like a responsible adult.