The saddest thing about kids who grow up without any sense of responsibility is that eventually their peers, society, or the law will make them pay their way. Please know I understand how difficult it would be
on you to instill discipline at this stage (especially with everything else you have going on), but dark_heart_x's approach would truly be doing them a favor.
Maybe with your gentle, loving touch, you can come up with a Mother's variation on dark_heart_x's Tow-the-Line theme & maybe even with a tiny bit of your husband's input make some
little changes here and there. Half-silly, half-serious ... or whatever might mesh (if anything does) with a teenage girl's quirky/whimsical/hormonal personality!
IF you got to a place that you were ready for more, maybe a race between sisters, cleaning up after themselves? Any competition there? Loser might
get restrictions on some "freedom" that's really causing trouble ... do you follow? Probably that would be too much ...
And what about nutritional support ... are you good there? Are you
sure you're making up for everything the meds and this treatment are depleting you of?
Roadie