Meritaten [SEP] sister
could be Akhenaten. If so, this means Akhenaten took his own daughters as wives. Another princess named Ankhesenpaaten Tasherit had been suggested as an additional daughter of Meritaten, but it is more likely that she is a daughter of Ankhesenpaaten. 
Biography.
Biography Early years in Thebes.
Meritaten most likely was born in Thebes, early in her father's marriage to Nefertiti, perhaps before he assumed the throne, as she is shown officiating during year five of his reign. The royal family first lived in Thebes and the
once mentioned Akhenaten's second wife Kiya, it is also possible that they were children of Akhenaten and Kiya, or that they were fictional, replacing the name of Kiya's daughter, who might have been Beketaten, more commonly thought to be Tiye's child.
Proposed parents Meritaten and Smenkhare.
Dodson proposed Ankhesenpaaten-tasherit was a daughter of the young royal couple Meritaten and Smenkhare. The young princess would have been named after Meritaten's sister.