The wife of deceased Co-sharer is a legal heir of her husband.
So she gets share from estate/property left indisposed by her husband.
Death certificate, legal heir certificate/affidavit (per local procedure/precedence’s/rules)….affidavit/indemnity/NOC etc are basic requirements……
By the lady’s entry in records (mutations) she attains rights equal to that of owner by inheritance…
Once IT succeeds she certainly has a right to act like owner (per provisions of applicable local rules)…………….
Simultaneously all other legal heirs get share by inheritance e.g; Mother, sons,daughters..!
She can dispose her share (per applicable rules/codes) in anyone’s favor by any valid/registered deed e.g; relinquishment/release/transfer/gift/sale etc.
If said property is of deceased brother:
Then by which law/rule you and other siblings are expecting a share?
If you are all Hindu; and deceased brother has not left and sons, daughters and his mother was also not alive as on date of his death; then his wife is sole surviving ClassI legal heir and hence full owner of said property..
On what grounds Family settlement is being contemplated?
On what grounds do you expect to become her sole legal heir?
She can otherwise dispose in your favor by say; other than relinquishment deed e.g; sale/gift!