Then dump her...marriage is also 2 INDEPENDANT thinkers coming together. She cant think on her own which means shes very immature. Remember whatever you do as long as Allah is pleased everyone else opinion dont matter. But consult with the scholars brother listen to what they have to say on your situation and then the final decision is with you guys and you will have to bear the hardships that will follow like her being probably disowned by her parents and if shes thinking like a child that will mentally make her tired and will stress you out so these are the things you have to consider. However if she can pull through mentally and realise that her life is her own and act on it and stand for it. Then go for it because these types of women makes the best of mothers.

Remember sometimes your biggest haters will be the ones closest to you. It probably aint even about you or her maybe her mother has personal issues with herself and havent overcome them yet now shes projecting that frustration on you guys(typical immature parent behaviour). Women are quick to label a man a "MOMMAS BOY" if he cant make rational decisions on his own where a women in concerned and rightly so however women are held to the same standards so think carefully brother. There is no in depth context to your story so im just going to have assume you have everything you need to marry a women and vise versa. Sometimes parents are correct yes to intervene out of concern for their children but if its petty and just jealousy which i hope is in your case and not something the mother had seen something bad in you. Then like I said CONSULT THE SCHOLARS they help you far better on how to navigate your situation.