Legal claim to already transferred property

Hello all, I hope you all are doing well! 

I'm Rajan from Mumbai and my question is - can my father or his family members from his first marriage, lay claim to a property that my mother has transferred to me via a gift deed?

Background - 

• My mother is my fathers second wife
• He has 3 children from his first wife. He has not divorced his first wife yet
• He and my mother might have a marriage certificate registered. My mother does not recollect this
• The house we stay in was bought in my mother's name, with financial contribution from my mother as well as father
• My mother decided to transfer the property to my name, since we fear that my father might transfer it to either of his children from the first wife and they are predatory in nature

Question -

• Can my father or other family members sue me to get their equity in the property?
• If yes, how can I start mitigating trouble beforehand?
• Are there other things in your esteemed experience that I should be careful about?

I would highly appreciate your kind opinions on this matter.

Best Regards.