When Kashta, a monarch of the 25th Dynasty, extended his influence to the Theban area, she was compelled to adopt Kashta's daughter Amenirdis I as her successor and name her as her chosen heir. Shepenupet and Amenirdis are depicted together in Wadi Gasus.
The expansion of Kashta's kingdom into the Theban region led to a situation where the local ruler was compelled to accept his daughter Amenirdis I as her rightful successor and designate her as her preferred heir. This is illustrated by images of Shepenupet and Amenirdis in Wadi Gasus.