They sound like terrible people, tbh. Who refuses to let a child live with them under any circumstances after 18? Like, their supposed low income doesn't explain that! We're supposed to believe that it was some kind of shock treatment because they were afraid she'd fail to ever get a job if they didn't throw her out of the nest? But that only makes sense if they had no knowledge about the job-finding and residence-hunting behavior of other human beings at their disposal. It's hardly a common issue to be afraid of, which makes it sound like a weird excuse. A lot of their clarifications sound like that. They've editorialized so much their own memories are faulty, or else they're covering up the real reasons because they look bad.