In the past year and a half the father of my 6yo and 9yo has not been visiting except maybe 6 times. The kids do not won't to be around the girlfriend or her child because he (the child) decided to show his privates to them! I have not forced them to go and neither has the father. But he isn't helping pay everyday costs either. He basically has just forgot them and not tried to solve the issue.. I need assistance.. what do I do?