My spouse does not have celiac disease, but does have tree nut allergies. We look out for each other. I cook most of the meals so that part is easy.
When we visit family they are very supportive, my sisters and my sister-in-law have gone to great lengths to look out for me, cooking special meals I can eat. My In-laws are great too, whenever we visit them in Scotland they always stock up on GF food and cook 100% GF meals while I'm there.
I guess I'm very fortunate to have a wonderful family!