Can I be legally bound to be the go-between for kids in a domestic dispute?

One parent filed bogus domestic abuse charges against the other (my brother) and the protective order is in effect for the next 6 months. Despite her allegations of abuse by the father, the woman wants him to have his biological child and his step-children two days a week. The parents are not allowed to see or speak to each other, so she has to drop them off at a certain public spot for him to pick up after she's left. The problem is that she named my mother, an uninvolved third party, as the person to do the transfer. My mother is elderly and does not even drive, I have to take her wherever she needs to go. She called the court and the judge said to tell my brother's wife to name someone else, she then named me. I have to make a 40 mile round trip to do this twice a week, and I am livid at her assumptions that I would be willing and readily available to do this. I have my own child to care for and I just can't do it twice a week for the next six months. Is there any way I can get out of this responsibility? I think she should have some of her family do it for her, but apparently she wouldn't dream of having one of them court-ordered to do this for her.