I disagree that this question is a duplicate of those specified... While the title of this thread indicates that he's looking to make his coworker's slacking more visible, the actual text of the question makes it clear that he'd rather get help from his coworker.

Great answer! But I wouldn't CC "the future boss' boss", as that would likely be viewed as "calling out" her soon-to-be boss. There are definitely appropriate times to do so, but I don't believe it's warranted on a first offense.