No. Here is what is going on. She wants to eat. She wants to eat until she feels stuffed, and she wants to eat all day. This part is obvious, and it is why she weighs 541 pounds.
However, she realizes that being so ginormous is limiting her ability to function and move. That bothers her. If she were a porky 290 pounds, she would be happy as a clam.
So, what she really wants is to find a way to lose weight that does not involve giving up all-you-can-eat buffets, daily Cheesecake Factory, multiple Taco Bell runs in a day, bedtime Peanut Butter Cups, pints of Baskin Robbins, et. al. She wants to lose weight only if she can keep eating like she has been.
This is why she games the diets. She heard she could lose weight on one meal a day, so that one meal has to be three meals at the same time. She heard that 10,000 steps a day would help her lose weight, so she counts trips to the bathroom as "exercise". She heard that rice will make you feel full and eat less, so she eats a bucket of rice. She heard that broccoli is healthy to eat, so she will drown it in salt, butter, and cheese. She heard that chicken is a zero point food at Weight Watchers, so she will eat a mountain of sugar-glazed orange chicken.
In this, she resembles a con artist more than a dieter. Give her an inch, and she will take a mile. It isn't about making healthy changes; she doesn't want to change anything. Sure, she thinks she'd be happier 300 pounds lighter (she wouldn't be, but she thinks she would). However, she only wants to get there if she can still eat what she wants.