Central to the theory is that Akhenaten was being driven to produce a male heir that results in attempts to father his own grandchildren. If the grandchildren are not his or are indeed fictitious, with no progression through his daughters to arrive at Neferneferuaten-tasherit, his choice of her as coregent at least remains a mystery, if not less likely. Without grandchildren, there is less to support the older age estimates. Her age alone need not disqualify her, since it is the same age at which Tutankhaten ascended the throne, but a ten-year-old girl seems unlikely to many.