What, precisely, is the older sister remotely worried (or even concerned) about?

(I assume:) She's confirmed by the Board of Health for the state she's practicing in. She has a practice with plenty of people who trust her opinion.

Once you get to be a full-fledged doctor, you've passed so many trials that I find it hard to believe this is objectively an issue. "Oh, my sister's doing the same thing? Cute!" That doesn't devalue or otherwise call into question the decade of hard work it takes to get there.

It sounds like the older sister is acting in ways that continue this addictive/abusive cycle. Sure, she needs therapy, undoubtedly -- but the end of this has to be a sisterly respect. My guess is that the older sister has never fundamentally called out the younger sister and been willing to do what's necessary to get the respect she needs. At the same time, why does the younger sister keep doing the same thing the older one does? That's pathetically incompetent decision-making.

They don't know how to live any other way. However, to "break free," instead of paying for therapy and talking about how much they don't like things, they're going to both have to implement life change. I won't wait for the update - I don't think either of these book-smart chicks have a strong enough character to do that.