I have a similar situation! My ex wife has not paid me a dime for child support for 7 years. Though I have never violated her visitation right, for the past couple years, she rarely visit my son and her mother (my son's grandma, my ex mother in law), instead come to pick up my son. My ex wife did not even take my son (8 year old) out for Mother's Day for years.

Last year, she moved back to her country. My ex mother in law continues to visit my son. When my son stayed with her, he did not go to bed till mid-night, so it is hard for him to adjust to the normal hour during school days and he is late for school some time. Actually, the grandma suppose to take my son back on Saturday night, but she always give me an excuse said; he played with the other kids till 11:00 pm and he is sleeping right now, so I need to take him back tomorrow. I finally insist that my son need to be home before 10:00pm Saturday night. Now, my son think I am too strict and the grandma treat him better. The grandma is the one who keeps creating conflicts and making my son misunderstanding me. Sometimes, without my consent, she even came to my house to see my son.

Last week, my son had fever while staying with her and she called me she couldn’t handle it, so I went to her house to pick up my son and the next morning at 6:30 am, without my consent she came to my house and looks through the window while we are sleeping. Then, the next day, while the outdoor temperature is 38 degree and my son was having fever of 102 degree and she even took my son out without my consent.

I am tired of dealing with my ex mother in law. Is there a way to keep her away from my son and from my house? Of course, there is no contract between us.

Yeah - stop letting her take your son and if she does, call the police. It's kidnapping and a felony. The visitation agreement was between you and your ex and it does not transfer to your ex mother in law.

What state are you in because some states have grandparents laws on the books. Also if she is being disruptive then you have a decision to make and can cut ties until a court tell you to do otherwise or you also have the right to privacy and can get a restraining order against her if she is going over the top. Im sure in part some must be guilt that is driving her because it is her daughter that abandoned the child. You may even want to speak to her as to why all this stuff is going on and as ADULTS talk it out so something can work for you both. Barring that at this time you have the power to decide.