My question involves a child custody case from the State of: Texas.
I live a few hours away from my son currently, but have just found out from a source that my ex-husband, who was just married about 2 months ago to a woman he has been living with for quiet some time and has an infant with, moved out abruptly to live with his mistress, whom is also still married and has 2 kids of her own. My son, come to find out, is now living with his grandmother who lives 2 hours away from my ex. They have pulled him out of school and enrolled him in his grandmother's school district for now, but his plan is probably to move him in with him and his mistress eventually, which will again mean changing schools(He is in elementary school).
I have not been notified of any of these changes other than a phone call a month after he moved out from an anonymous source. He took this woman and her kids up to visit my son and his grandparents only a week after moving out of his wife's house. Do I just need to file for contempt of court and hopefully get custody of my son? Do I have any legal rights to just take him home with me if he is living with his grandparents? I'm very concerned about my son's physiological well-being.
My husband and I have other children and a very stable household that I know he would be much happier and better off in. Any suggestions on a course of action is greatly appreciated!

