Can a sibling acquire whole property of mother

1. Mr. A, Mr. B, Mr. C and Mrs. D are siblings who have inherited their parental property after the death of their mother intestate. 2. Mrs. D is divorced and is living in the said property since more than 10 years (starting before the death of their mother). Also, since the past few years, her daughter, also a divorcee is living in the same house with her own son. 3. In consideration of the fact that Mrs. D has no other accommodation, the brothers executed a family settlement wherein she would get 30.01% while each of the three brothers would get 23.33% each. 4. Also, before her death, their mother had gifted each of the brothers Rs. 7 lakh. 5. Now, when the brothers decide to sell the property (around 3.5 cr), Mrs. D is claiming that as she was living with their mother before her death, she was taking care of her and thus she should get the entire property as it was their mother's dying wish (which is not in writing anywhere, only claimed by Mrs. D) Can Mrs. D win this case?