How soon is "just" broke his ankle? Did he do it today, and get it cast today?
If so, I'd cut him some slack and tell him "fine, you get tonight off. But tomorrow, you pick up the pace a little bit. Deal?
Hobbling around the kitchen mixing and cleaning things would suck, but he sure as hell can warm leftovers in the microwave.
However, if he's been nursing sympathy for a week, then that tolerance ends right now.