I'm doing this one at the moment too, and my physician is a drunkard. She has the 'needs a drink' debuff showing, but when I click on the forest she has no option to go to the fountain. It's odd, because the text with the quest task says something about 'guess I could have another one or two', but if she does that she won't have the 'needs a drink' debuff anymore that I thought she needed to go back to the fountain. Has anyone done this quest with this fatal flaw and have any insight for me?