No the daughters cannot claim right if father died before 2005 and the Girl has been married before that.According to Hindu Succession Amendment Act, 2005, every daughter, whether married or unmarried, is considered a member of her father's HUF and can even be appointed as 'karta' (who manages) of his HUF property. The amendment now grants daughters the same rights, duties, liabilities and disabilities that were earlier limited to sons.However, a daughter can avail of the benefits granted by the amendment only if her father passed away after September 9, 2005. Also, the daughter is eligible to be a co-sharer only if the father and the daughter were alive on September 9, 2005.
No the wives cannot claim the share in husbands property.
No the Consent of Daughter in Law is not required.
Yes POA can be given but daughter in law has no role to play in property of father In law.
the sale deed is valid again same daughter in law cannot claim succession rights under hindu succession act.
No the daughter in Law Cannot file a Suit for cancellation of sale deed.
If the title of the property is clear that is it is mutated in name of legal heirs than by way of unregistered family POA property can be transferred by all sons and mother together no daughter in law and daughter consent required in your case.
Daughter In Law does not have right so she cannot sue for father In Laws property as there is no will either in name of daughter in laws.
The validity of POA can be challanged as it is unregistered by the son or the mother or any other party to transfer.