Sometimes, stress binge eating just creeps up and beats you over the head. I'm not part of Al-Anon anymore, but their adage of "one day at a time" really applies here. Sometimes shit really does happen all at once, and the best you can do is live each moment as something of it's own. Y'know, seeing every tree on it's own because seeing the forest would scare you into a pile of goo and bones.
Maybe an upside to the broken foot would be getting slightly healthier food into him (bone broth and bone friendly veggies) and maybe those habits will stick. Even bone broth instead of water in his ramen would be a good start.
Depending on which bones he broke, it doesn't hurt like the end of the world, but more like a sprain (speaking from experience here.) Either way, he needs to get off his foot or into moon boot as soon as feasible. Even a quack in a box (urgent care place) should be able to diagnose and wrap him up, and for less total cost than the ER.
To be fair, any human in loving relationship would wig if a loved one tried to carry like nothing had happened with an obviously broken bone.