Dhaana (gift) settlement

Dear experts:

                                           My father have self acquired house property (Not in the character of Ancestral property).   My father is deciding to write Dhaana (Gift) settlement deed in favour of My Name. I have 2 elder sisters both are married. Now my father is living and good health and sound mind only.

My Question is

1. My sisters have any rights in my father self acquired house property?
2. If settlement deed is execute in favour of me. My sister can file suit against the settlement property after the death of my father?
3. In future suit is file against the property.. the suit is valid? Court may cancel the Dhaana (Gift) settlement deed and will give shares in the said property to my sisters?

Please give valuable suggestion for me. Thank you!