Put your best effort into spending some quality time with your child. Little children need lots of love and attention. I have read that 80% of children think the break up of their parents is somehow their fault. Reassure your child as soon as they can understand that it is not their fault. My daughter felt that when her father was late to arrive or did not show up at all, then it was her fault. That she was not deserving of his time or love. That was very sad and I would try to come up with possible excuses for his late arrival, (flat tire perhaps). Something, anything, to try and convince her that he loved her. When her father's mother told her (without thinking what damage her words would do)that her father would visit her more if she was a boy, then that one stupid comment undid all the previous work I had done. My daughter come home crying because of this thoughtless comment. When you visit you son, just keep all you attention on your child. Please Please don't use it as an opportunity to check up on your wife or to speak ill of your wife's family. That kind of stuff is very damaging for a child. As a positive note, if your son talks about the great visit with Dad, then you wife will become more interested in arranging visits.