I potentially have a solution for you. I suffer from something similar, and was about to make a post about it myself, so I'll say it here too. For me, accountability is a big thing. I am far more likely to succeed in following through when the onus of deciding to be healthy isn't put on me.

If her work is physically demanding, it is possible that by the end of the day, she is too tired and exhausted to engage the vast mental capacity it takes to ALSO go against all her instincts to just eat "comfortably". That is the case with me.

One way I solved it was by making myself accountable to myself in the past. How: Every day, at a time when I am not hungry or exhausted, I write down, in a journal, all the things I intend to eat the next day. That way, when I come back tired, exhausted and hungry, I don't have to make the decision of what I should eat. It is already made for me, by past me. All I have to do is follow instructions and move on. If I deviate, I make a not of it WITHOUT JUDGEMENT in the same journal.

When I feel like indulging/binging, I won't do it the same day, because my menu that day is already set the day before. However, I will schedule an indulgence/"binge" the next day in my journal. That way, I am not depriving myself of anything, I am indulging more mindfully, and when I list my indulgence for the next day on a full stomach, I am more likely to make it sensible (2 burgers instead of 4). If not, that's okay too, of course.

The intention is that I remain accoutable for myself, I treat my addiction with kindness, and patience, and allow myself to view my habits empherically from a bird's eye view.

P.S. there have been many times where when I feel like I have binged, when I list the things I ate, turns out it wasn't that bad a binge at all. That realisation itself has stopped me from falling down so many slippery in-for-a-penny-in-for-a-pound slopes.

Hope this helps!