What other reason for the disclosure of the affair could there be, but that Elinor might be informed by it of Lucy’s superior claims on Edward, and be taught to avoid him in future?
It was not the first time of her feeling the same kind of conviction; for, more than once before, beginning with the observation of "your sister looks unwell to-day," or "your sister seems out of spirits," he had appeared on the point, either of disclosing, or of inquiring, something particular about her.
His chief reward for the painful exertion of disclosing past sorrows and present humiliations, was given in the pitying eye with which Marianne sometimes observed him, and the gentleness of her voice whenever (though it did not often happen) she was obliged, or could oblige herself to speak to him.
There are no more uses of "disclose" in the book.
Show samples from other sources
As if she’d had to do it too many times before and it had gone badly—the admission of wealth that’s greeted with too much enthusiasm, the disclosure of a secret identity that she herself didn’t create.
Gillian Flynn -- Gone Girl
Before I show you this, you have to give me a verbal non-disclosure agreement, okay?