2 registered Gift deeds of same property

Sir/ma’am my father in law gifted me his house two year back by a registered gift deed .In that house me and my family reside from past 30 years. And last year my brother in law also took my father in law to the registrar and again made a registered gift deed of the same house with by pressure and misguiding my father in law. As i am a widow and im living with my father in law since after my marriage with my family and he with his wish gifted me this house by a registered gift deed. But soon before my father in law died and after that my brother in law is forcing me to vacate the house as he also have the registered gift deed of the house. But the gift deed of mine is registered one year before the gift deed of my brother in law. As my brother in law never live in this house after his marriage. I want to know that whose gift deed is valid and does he have a right to live in my property and to get the title in his name. What should I do so that he cannot come and live in my House.