You shouldn't bar your partner's family from seeing your kids.
Barbara recently divorced Mack, who is living with his parents, which were always intrusive and rude towards Barbara.
Barbara wants to avoid spending time with Mack's parents.
Barbara asks Mack to pick up the children for his weekend visits, as she wants to avoid conflict with his parents.
Barbara will not allow the children to visit Mack at his home, because she doesn't want to see his parents when she drops the kids off.
Mack wants to make sure he is a good father to his children, so he respects Barbara's wishes.
Mack takes Barbara back to court for visitation rights, which costs Barbara huge amounts in legal fees.