I live in Texas where my divorce was finalized in 2009. My ex moved to Illinois after our divorce. Our divorce decree says he will have the kids on Wednesdays and every other weekend. Since he moved, we have a verbal agreement that he would have the kids in the summer, during Spring Break and Christmas. Many times he has come up with some reason that he cannot take them. That is happening again this summer. What can I do to hold him responsible for what we agreed on?