Even the king didn't seem dumb enough to get that kind of brilliant idea ! What kind of reward could they have promised to Melvie to get her to work for them ? Freedom ? That'll end well.
Also, I want to think Fleur's greetings line is not complimenting Fooly for breaking out of the curse, but she's just proud of him for flashing the enemy party leader.
Completely unrelated but :
page 2 panel 2 : "you're" not "your"
page 4 panel 3 : "you're"not "your"