If it is so, your wife can file Pre-litigation conciliation petition before LSA and can avail of free legal advice and guidance, as it is more torture for her husband and preserve the documents if any of your daughter's letter to you while deserting the family relationship, your income, your other children and your commitment financially vis a vis your income.
If you can afford to pay at least LSA may suggest a time frame for such maintenance if she is educated and can secure say one or two years and her share in the ancestral property if any etc.
As this is a family issue the issue has to be settled among you with interference for elders and legally also, and there can not be a better solution. as she is after all your daughter, and if ignore her, she may not be happy in this age after such marriage and these misunderstandings in love marriages are common, and finally it is in between own family members, in which compromises, adjustments for family name and well being are key factors.
