"Well ACTUALLY.... the real Wraithvine would've cursed me already...."
"Well, if that's what you believe, then who am I to refuse? From now on, you are hereby cursed to never again to be able to tell a lie. Have a nice day, I'm going to relax and let my pet play for a while."
Heheheheh... pretty much yeah.
Wraithvine doesn't really curse that many people and THIS example was clearly asking for it.
Hey, at least it's a fairly gentle curse. The person just has to learn to accept being honest.