Since they are in her care, she can administer corporal punishment that is not physical abuse. The only solution that I can see is not use the stepmother as a driver babysitter, etc while in your care. Otherwise, the stepmother can discipline them as she sees fit. For example, if you hired a babysitter, and the babysitter ignored your instructions on discipline, you would probably fire the babysitter. This is the only control you have over the stepmother. Unfortunately, your daughters will have to get used to one set of rules at his house and one set at your house. In the long run, the step mother is hurting their father, not them, because it is probably damaging his relationship with them.
Answered on Oct 11th, 2012 at 3:34 PM