Purchase property Behalf of will????

If it is her self acquired property then will executed in the name of her yonger son is valid, if it is not so then she is right to exeucte the will to the extent of her share, she cannot execute the will for entire property.  If it is inherited property then other brothers can claim their share in the property.

If it is self acquired property of your mother then she's right to make a WILL and u r owner of the property. U r sale this property any person. No body can stay for the sale this property.

but the brothers can claim the will in court

sir here is the question is raised that

the property is his husband name after that the husband is expired then property is transferd automatically to his wife .

so it's not her self acquird property .now she can execute any type of will ?