Some people are just insane.
I had to give someone her money back and tell her to find somewhere else that would spray her the way she liked. She complained the entire time I sprayed her that she wasn't getting darker and how I charge twice the price of my competitor ( i actually charge $5 less.) After the second session I used two full cups of
solution on her and she still complained how I don't include a drying session in the standup like my former competitor and she wasnt tan still.
Just remember you are probably not the first person to kick that women out of somewhere and there doesnt sound like there could be any way to satisfy her.