I never quite understood why anyone would try to keep a SP a secret. First off, it's not like you're going to be dating her (possible, but unlikely), so if you're gonna get jealous, well, that is weird.
Secondly, seeing as to how this is a public board, where a person will collect information on a particular SP, it's only mutual that you return the favour if possible.
Finally, you're denying her a right to earn if she's the type that may rely on word of mouth or review exposure.
Now, that being said, I can understand why some people would not post a review (privacy, SP's request, whatever), but I sure wouldn't say "I have a secret" and leave it at that.
Just my 2 cents.