Seriously if that is her excuse then she's not willing. Don't bother trying to help her. I mean come on, it has to take way more time and effort to drive to some place like Jenny Craig and sit through the bullshit sales pitches, then purchase all the food and open all the boxes and deal with the instructions and the trash only to have a bad-tasting, small meal to eat. If that is more appealing than putting a chuck roast in the crockpot over night, then there's really nothing you can do.
Female, 5'3", 50, Max squat: 202.5lbs. Max deadlift: 225 x 3.