A father had self acquired flat in Mumbai.After his death the flat was transferred in Monther's(spouse's) name. Before her death mother executed gift deed and gifted the property to son by paying tax and registration charges etc, who is married with no prop in Mumbai or elsewhere. Father never made will and died intestate. There are two married daughters staying in Mumbai with spouses who have their own flats.
Q1. Is the gift made by mother to son valid gift?
Q2. Do married daughters have right to share in father's property?
Thanks and await guidance