My girlfriend and I have been together going on two years. She has a son from an ex-boyfriend, they don't get along great. I am like a father to the son, and am always respectful of his father. They have a parenting agreement, and it doesn't address her living with a boyfriend. He is married now and has two other children, one four months older than my girlfriends son.

I bought a house for us to live in, but she has yet to move in for fear that he will try and get custodial guardianship of the son because she is living with someone out of wedlock. She is an amazing parent, and I am a very stable person whom the child loves. The father has had some domestic violence issues in the recent past in front of the children. I am of the opinion that all things being considered, the courts would never take a child from a great mother who consistently keeps her child in a healthy environment, but wanted some professional opinions.

Please help!

Is this parenting agreement a legal one or a verbal one between the two parents?

It is a legal agreement, they had a mediation

Unless there is something in writing preventing her from just living with another person, then it is perfectly legal for her to move in with you. The court would have no say as to who she lives with or where she lives. Her ex can take her to court but I sincerely don't see him winning here. They were not married so there is even less legality of him being able to dictate who she lives with.

It sounds like she has primary custody now and there would have to be a lot of serious problems present before a judge would rule otherwise.