Those shakes look to have awful macros too. Tons of carbs and way too little protein. This sedentary fatty does NOT need liquid carbs on top of her already carb heavy diet. At most the only liquid calories she should be intaking should be from whey protein isolate.If she was serious about losing weight, she wouldn't play with the intervals between meals. They're there to help you learn how to get used to not shoving something down your gullet every time you think you need to.
Buying the shakes when she's indifferent towards them is setting herself up to quit JC. There are surely alternatives she'd like better and color me dumb but I don't think "shakes" of any sort have any business in a weight loss diet program. She needs to focus on FOOD & better alternatives to the processed slop she prefers.
She said she buys the same meals to keep things 'super simple'. Those meals are prepared, pre-portioned & cooked, only needing to be nuked to eat. She knows when to eat fruit & veg & is no doubt given a list of suitable choices so she doesn't have to do much thinking. How much simpler does she need? If she led a complex, life with days filled with fast paced decision making, I could see wanting to keep dieting as easy as possible but her most complications decisions probably revolve around what exact shade of pink marker to use on a coloring book page.
I suppose Becky could always cut up her food & spoon feed her but I don't think she could keep up the demanding pace from plate to mouth.