In the case of Mason v. Coleman, the Supreme Judicial Court of Massachusetts dealt with a custody dispute where both parents shared legal and physical custody of their children. The mother sought to relocate with the children to New Hampshire, but the father obtained an injunction to prevent the move. The court distinguished this case from others where one parent has sole custody, emphasizing that in joint custody situations, the interest of one parent in relocating is often diminished. The court reviewed factors such as the quality of schools, the impact of uprooting the children, and the lack of clear benefits to the mother from the move. Ultimately, the court affirmed the trial judge’s decision that the relocation was not in the children’s best interests.