I can imagine how you must feel. I am a mom & a stepmom.
I would encourage a good relationshop btwn your dtr & her stepmom.
Only good things. My husband's ex has tried to make problems for me since my husb & I were dating.
She does her best to pitt her dtr against me & to undermine our rlshp.
It's sad. My stepdtr & I had a good relationship in spite of her until my husb & I had a child of our own.
Her stepmom is more her friend and hubby left me to do all of the parenting which later back fired for me. I was the heavy.
I'm still glad I did all of the things I did for her & I feel I tried my best.
I love his dtr like my own. I would hope any stepmom would have a good rlshp w/their step kids. It's important.
When my husb left me, I remember thinking I would do my best to encourage my child to develop a rlshp w/whomever he ended up with (as long as she was a good person & nice to my son). We have since reconciled but the rlsph w/his ex will always be non-existent per her request.
It is sad & much more diffcult for the child.
For her sake (and any child's sake), I would hope everyone could get along.
I would not take it as an affront if your child wants to speak to her. Be glad she wants to get along w/her since lives there & w/her.
I wish you all the best.