Ugh! Well, what's done is done, and this genie isn't going back into the bottle. I read your other thread about your friend neglecting the female but didn't realize that she had lost half her weight during the ordeal. I would just monitor her, hope that she didn't pick up any illness the male may be carrying, and keep my fingers crossed that she doesn't ovy until she gains a few hundred more grams.
I am confused on the QT though - where are the male and female located in the house so that your husband found it more convenient to put them together rather than around his neck or into another tub temporarily while he cleaned the male's enclosure? And why did he leave him with her?