I realize I have a natural point for the heroine to reveal something to the hero except that -- he has to learn it later, when he has a powerful reaction to it. There are a couple of things that might shut her up but only if properly deployed.
I put in that something the heroine has to do is a test, and she won't be allowed to study unless she passes, and I realize this has to be mentioned before half way through the test. She would be positively threatened with it.
sigh The things you miss.