My husband and I are in the middle of a custody battle with his ex-wife. For the past year, we have had his son living in our home five nights a week and she kept him the two nights she was not working. His ex works night shift from 11PM - 7AM so her ability to see her son is unfortunately limited. We pay her full child support and have tried to let her see her son as much as possible. Unfortunately, a big can of worms opened when we discovered she claimed their son on her taxes last year and we did as well. The IRS informed us the person that has physical custody of the child more than 50% of the time has the right to claim the child. She decided she wanted to have him 50% of the time (so she could claim him) and has hired a 21 year old babysitter to watch their son while she is at work from 11pm - 7pm (the child is 9 years old!). The original divorce agreement was to split the child 4 nights one week and 3 nights the next for each parent. I am nervous the court will side with her, since she is the mother. Advise?