Well, only few of the husbands are there on face of the earth whose voice is listened by their wives. So you are among the commoners and not among the privileged class.
on a serious note, this not a issue which seeks legal intervention.
Try to make reason with her to make her understand that it is important to take care of both the families. i am sure she would understand your words and you would get marital bliss in not time.Good luck.