Ribeye + Fries? You can do better than that as a last meal FG!
It's amazing how much kids absorb. My D, and it sounds like your S, both sense that something is wrong, even if they don't know exactly what. It'll be interesting to see what your W wants to tell him is the reason.
No mind reading though. Who knows what else may come out of any conversation around it. Not something worthwhile to dwell on.
Stay strong brother, and let's find you a better last meal!
Me39 M11 : T13 D9 BD 5/31/16 In House S until 6/21/17 Divorced 10/5/18
