On Mahmud's death in Samarkand she joined her brothers in Tashkent, going off "without giving any notice of her intentions," says Babar.
Haidar Mirza throws some light, and it seems that when Shaybani had murdered her brother, Mahmud Khan, Awiq left him and joined the Uzbek Qazaqs, his own people, and Sultan Nigar followed him into Moghalistan.
On Awiq's death, Sultan Nigar was married to his brother Qasim, presumably in consonance with the Turkish custom of yanglik.
With Qasim's death, the khanship of the Qazaqs devolved on Sultan Nigar's stepson named Tahir.
For I am grown old, and I have no longer the strength to bear this wandering life in the deserts of Uzbekistan.