"Hmmm, I've written myself into a corner, if she tell how her father actually abused her, I might have to think hard to keep the story going instead of relying on easy drama... Ah, I know, Deus Ex Machina rules appearing in a video game style UI out of nowhere. Oh, lets say there's 3 rules, so I can get two others 'get out of jail cards' later!"
Now, I know the author probably planned it from the start, but that's still what it feels like. The "rules" thing should have been established from the start, with something like "There's 4 rules. Rule 1: Do not mention you're a reincarnator", which doesn't affect the story.
The way it's written, you think "great, she'll finally say she's been abused, and get some support from the duchess", only to get whiplashed.