Generically speaking; Anyone may claim share citing some reason as valid logic on legal grounds.
The claim has to either succeeded on merits or is to be defeated on merits.
The share does not vanish with time.
The Co-sharers may claim even mense profits.
The legal heirs may stake claim after their Mother!
Succession opens on date of death; by inheritance or by testamentary succession (by valid WILL).
In case of Hindu male dying without disposing her estate/property in her life time by a valid/registered deed the 1st right is of ClassI legal heirs i.e Mother (if alive as on date of death), Wife (if alive as on date of death), sons, daughters……
In case of deceased Hindu woman dying without disposing her estate/property in her life time by a valid/registered deed ClassI,II is not applicable rather nature and source of property matters.
If the property is self acquired/earned/absolute in the hands of Hindu woman the 1st right is of her husband (if alive as on date of death) and sons, daughters…………
If property is acquired from husband side 1st right is of her sons, daughters…………and if sons, daughters are not available then legal heirs of husband..
If property is acquired from parents side 1st right is of her sons, daughters…………and if sons, daughters are not available then legal heirs of father..
You may mutate the property in the name of legal heirs.