You're a real stand-up guy.

[ Sarcastic as she is she sounds kind of amused. ]

But people have done things for worse reasons I guess. Doesn't matter why as long as you get the job done, right?

[ Though that does make her wonder about the person in question he's trying to prove wrong. ]

Wouldn't let that person know you did it just to spite them, though. You'll give them too much power and credit if you do.