Ah fair enough, you can also dismiss her then leave the cell and wait for a few days. People say the time is 30 days, but she has reset for me in much shorter time periods.
As far as daedric quests go, the wabbajack one isn't evil or morally questionable, you just do a number of weird tasks for the daedric god of madness (who is rather crazy, as you'd expect ha).
Never knew that they reset with their cells - thanks for the tip!
And I've done Sheogorath's quest a few times before

Its probably well-suited to a 'good' character, considering you cure a long-dead emperor of his madness. Also, the wabbajack is the most effective way to kill a dragon priest, I've found!