Mr Gaurav,
In all matrimonial matters the first spanner is the conflict of egos. Most of the strife emanates from the clash of egos. Before taking any action whatsoever introspect whether it is your own doing/imagination that she is manipulated objectively. Many truths in this world are our own perceptions rather than reality. Mother need not be ignored for doting affection on one's wife. They are different and have their specific place of their own definitely apart from each other. What happens usually is that emotions take the better part of our perception of reality. If despite counselling with your well wishers and objective introspection you feel that your opinion about your wife's behavious is well founded then try to break the ice through mutual wellwishers and see if you can save the marriage. Afterall people do not marry to live harmoniously adjusting to each other and not to quarrel and compete with each others. Many decisons it is seen now a days that couples are turning to wrong knowledge providers instead of reconciling with each other for their familial differences.
So Kindly assess your situation objectively.
If your problems are really real then go together to a marriage counseller and take counselling on how to ovbercome mutual differences. Then if that too doesnot work out start pondering legal imp;lications and angles and dont rush into litigation on the spur of moment impuluses which you might rue later.
Legal recouseshould to be reserved for the last in matrimonial matters and reconciliation effort should be first thoroughly explored. Happy married life to you and your wife.