When is it okay for a grandparent to modify their court ordered visitation? It's been less than a year and already the paternal grandmother is taking me to court seeking to become joined as a formal party to the divorce to be able to do this. Her own son is against this mind you. She's also seeking more visitation because she feels she deserves more than the every Wednesday 2:30pm - 7pm that she currently has. Any advice on this one is appreciated. It's a DOOZIE!