https://smile.amazon.com/DEWALT-DW2542IR-4-Inch-8-Inch-Adaptor/dp/B001309TT4

You need this to go from the 1/4 inch hex drive from the impact to the 3/8 inch square drive sockets she already owns.

As an option if you want to splurge this set is a great portable kit with several common sises and the adapter from above.
https://smile.amazon.com/DEWALT-DWA2T35IR-FlexTorq-Screwdriving-35-Piece/dp/B00G9CL83Q