His mother forced him to fall short with regard to the rights of one of his two wives
Question

                If a man has two wives, and his mother forces him to fall short with regard to the rights of one of them, and he gives his wife the choice between staying with him and giving up some of her rights or divorce, and she chooses to stay with him, is it permissible for him to do that?.
Praise be to Allah.
    There is no blame or sin on him if he gave her the choice and 
    she chose to stay, rather the blame and sin is on his mother who is forcing 
    him to do this. If he can advise his mother himself, or through the 
    mediation of someone whom she will listen to, and tell her that it is not 
    permissible for her to do this, and make her fear punishment in this world 
    or in the Hereafter, then this is what he must do, otherwise Allah does not 
    burden any soul beyond its scope. End quote.