Execution of will

1.There is a 289 Sy yards built up 2 storeyed house with registered sale deed 5376 dated [deleted] bearing the name of both Husband and wife,they have 2 married son and one married daughter 2.Husanbd and wife died on [deleted] and [deleted], 3.property is not partitioned and husband in his life time executed a registered will in 2009, on the name of grandson. ''that vide registered sale deed no 5376 I am the absolute owner of the front portion 145 sq yard of 289 sq yard house and which is on my name as per sale deed and therefore I am bequeathing it happily to my minor grandson whereas my other married son and married daughter have no right over such portion,he further stated that other back side portion 145 sq yards belongs to my wife which is on her name as per register sale deed 5376.'' Now the question is that if nothing as such is mentioned on the sale deed regarding 145 sq yards etc belongs to whom but bearing the joint name of both on the sale deed then such will executed by husband without consent of wife is valid or suspicious and liable to be declared null and void.?????