Issue related to home

It is believed that you are all Hindu.

Confirm!

Show the mutation record with all link docs to a very able local senior counsel of unshakable repute and integrity specializing in revenue/property/civil matters.

Confirm the nature of property; self acquired/ancestral in the hands of seller and date/month/year of death of seller.

In property law, a title is a bundle of rights in a piece of property in which a party may own either a legal interest or equitable interest. The rights in the bundle may be separated and held by different parties. It may also refer to a formal document, such as a deed, that serves as evidence of ownership.You can show the title documnt to that lady. 

Well, even if she files a suit against you, the burden of proof that the property belongs to her (and isn't is your father's name,) will lie upon her, which she won't be able to discarge, assuming you have proof of the registered sale deed signed by your father. Legally, you would not face any problems. 

Get in touch with the police and file a complaint against her so she would stop harassing you and the tenants in your father's house. 

Have you submitted death certificate,legal heir certificate etc of your father and property been transferred in name of legal Heirs?

Hope you have the mutation record showing ownership by inheritance.

If it was self acquired property of your uncle then he could dispose it in his life time without anyone's consent.

what was the age of your uncle's daugher at the time of sale made by her father to your father?

and what was her Age now at the time of challenging the sale?