A Peaceful Life for a Humble Household

The most ill-mannered female protagonist I've ever seen! Staying in someone else's house and secretly going through their things! Sneaking a peek at their mail! Her values ​​are utterly warped, and she even has the nerve to claim she's been reborn! How can someone who's lived for decades do something like this?

I didn't want to read any further after the first sentence. Where did the word "thousand miles" come from in ancient times?

It feels like Grandma is raising skinny horses, grooming successors for the brothel.