I think one of the most pitiful historical documents I have read is her letter to the king of the Hittites asking for him to select one of his sons to send to be her husband after Tutankhamun died.
No living children and she knew that unless she moved fast she was going to end up with either the General of the Army or her grandfather as her husband.
Professor Bob Brier, who recorded 24 hours on ancient Egypt for the “The Great Courses” and has published some popular books on Egypt, said the same. His conclusion was that she married the general, Ay, who was a commoner, but died without issue, resulting in the total destruction of the Aten cult and the restoration of the power of the priests of Amun.