Mainly the relation between the mother in law and the daughter in law makes a lot of difference in the family. As long as both of them are having an adjustment nature, the life of the males in that house will be peaceful. If there is any difference of opinion between will lead to many issues in the house.
A two-way attempt from both sides is desirable in all the house. In fact, the role of the mother in law will be more crucial than the role of the newly coming daughter in law.
Knowledge is power.