My boyfriend is legally separated, he has been out of the house for almost 2 years. He has an 11 year old and 14 year old boy. We are moving in together, planning to sleep in separate beds and rooms. My boyfriends ex wife is threatening that this is illegal and she will not allow it. Custody has not been decixded, however they do reside with her . They are not in a custody battle. Can they stay over?