So, THIS is the comic in which Diane says she told her sister and her parents she was dating Lucy the same day it began, but Diane is perfectly disguised by a wig and sunglasses in that comic, so maybe you want the previous page first.

The page AFTER she says she told them is also relevant for an aunt / "we agreed to think of each other as sisters" moment.

- Diane talking to Noah about avoiding her father, Adrian Raven, in the Father Storyline.

Worst. Example. Ever.

Diane would actually be one of the worst examples possible for this if not for the exceptions that are her biological father and keeping magic a secret. That's enough to give her a very general idea of how Hope most (Hope's situation is EXCEPTIONALLY unusual), but she should not have, in fact, led with "if anyone."