Jess, as I've had time to think about all of this, I also wonder if your mother isn't using Mollie as "currency" to obtain cooperation with her children. "Do this or the dog goes", kind of thing. I still think a good heart to heart with your father is your first best course of action.
We're all pulling for you Jess, so keep us posted, and follow our advice. Perform random acts of kindness on your Mother that have nothing to do with Mollie. It will be a win/win all the way around. Good luck sweetie, and keep us posted!

