Death situation

Now you are warming up and giving details. When your Mom is Daughter in Law, where is your Father and your Aunt? ie Your Granny's Daughter besides your Father. When you approach Lawyers, you should be ready to give all details. If you hide details and get some advice accordingly, it's dangerous for you only. Ask your Granny, what she wants to do with her property. She can write a Will or Gift deed only if she is in her senses but not otherwise. Please note that. Merely getting a thumb impression on a piece of paper or even on a stamp paper, will only show your unfair intentions, which will land you in problems and entangle you in extended litigations. Be fair to all and do what is just and equitable. Then only you can enjoy what you get. All the best.

Now you are warming up and giving details. When your Mom is Daughter in Law, where is your Father and your Aunt? ie Your Granny's Daughter besides your Father. When you approach Lawyers, you should be ready to give all details. If you hide details and get some advice accordingly, it's dangerous for you only. Ask your Granny, what she wants to do with her property. She can write a Will or Gift deed only if she is in her senses but not otherwise. Please note that. Merely getting a thumb impression on a piece of paper or even on a stamp paper, will only show your unfair intentions, which will land you in problems and entangle you in extended litigations. Be fair to all and do what is just and equitable. Then only you can enjoy what you get. All the best.

Incomplete and vague information, where you have been changing your stance in every reply,  can not lead to form an opinion and oblige.

The property inherited from your grand-mother can not devolve upon your mother during life time of your father and his brother/sister(s).

It would be better to contact, consult and engage a local prudent lawyer if there is some truth in your story.