Does step mother have right in the property of my biological mother

My question is Does my Step Mother have a right over my deceased Mothers property? My mother passed away 6 years back and my father passed away 6 months back. My father re married and the marriage lasted 4 years until he passed away and he did not have any child out of his second marriage. But step mother has had a daughter from her first marriage. What rights does step mother have in my mothers property? (Property is still till today in the name of my mother, we haven't got it changed). She is claiming my mothers property. We are Hindus