She should try editing the images to meet the clients feedback, but should also just deliver the raw files for free. Often clients will try and fail to do a better job editing, and will appreciate the photographer’s work more.
Excellent video about loudness:
Two giant soft boxes left and right, with the left being brighter. And a smaller light source above and behind on the left side to rim the shoulder.
Bounce the flash off the wall next to the window or next to you. If there are no windows in the shot, it can appear as light coming from a sunny window.