General Rules of Distribution of properties if No-Will is left:-
1. If the deceased has left behind both a widow and lineal descendants i.e. child,
children or remote issue, Widow will get one-third share in his estate while the
remaining two-thirds will go to the children.
2. If no lineal descendants have been left but other kindred i.e. father, mother, etc.,
are alive then one-half of the estate passes to the widow and the rest to the
kindred.
3. And if no kindred are left either - the whole of the estate shall belong to his
widow.
4. Where, however, the intestate has left a widow but no lineal descendants, and
the net value of his property does not exceed five thousand rupees, the whole of
the property will go to the widow - but this provision does not apply to Indian
Christians.
5. Where the intestate has left neither lineal descendant, nor parent, nor sibling, his
property shall be divided equally among those of his relatives who are in the
nearest degree of kin to him.
So it clear Ur view
And sale deed can be challenged by only ur's father's brother and mother not by u