Ancestral property

In case of minors share in the ancestral where the minors share has been sold off by minors mother to contribute money as a shared to perform Shradh of the paternal grand mother. In the above context and on being asked the mother is saying she has knows nothing other than this that (the co sharer in such ancestral property where the minor is also a party ) the minors mother has only signed the sale deed as asked by co sharer .. At present said minor is about nearly 35 yrs of old. Before a Court of law can the said sale of minors share of ancestral property by her mother while she was minor b challenged and said sale b declared as void? Secondly by way of plot no and of LS khatian of ancestral Vastu propery , the father's poetion of share is reflecting but the Area share is showing Zero..Again on being asked and as per rumors spread that the minors father during his life has already relinquished his right in the property even before prior to the marriage of the minors father's ( but now aged 35 yrs)... on payment of certain low consideration amount .. But the minors ( but now aged 35 yrs).. has come to know about this very recently and .is of the opinion that her father portion has wrongfully & by way of forgery has obtained by one of the co sharer in such Ancestral property in question who share is reflecting the highest. In the above background can it challenged before appropriate forum to get back her legal share .. She in want for the Bontan nama / chain deed of such Ancestral property to know how such propery being distributed among subsequent legal heirs more hee father's share to whom it has been as share.. Whats the remedy to get her right back.. Will the mother( who's a graduate) b also b held responsible for selling of Ancestral property no matter what being the reasons and/0r whoever had asked her sign. The answer to above questions may please be sent at [deleted].. Your help and cooperation in the matter will be very much valued.. S. Dutta.