I could see that talking about it would help. And talking here, you'll find other parents of diabetics, which I can imagine is much different than being a T1 like your husband and son. (and me) Minimed has a remote CGM display for parents that looks like it works really far away. As a T1, overnights were always the biggest concern for me since getting a pump. With something like that remote display, you could roll over at 3am if you are having trouble sleeping, and see where your son's sugars are.
I got T1 a bit later, age 14, so I was much more in control of the treatment than my parents, and I think that helped my mom. Even more, my mom found another mother of T1 that she could confide in. I think that was what kept her sane during the first year after my DX, or that's how she tells the story now 20 years later.