I am a mum (mom if you prefer) of two boys. The big one is 19 and the wee one is 16. This is how my husband and I refer to them, but you may feel it’s a bit impersonal. How about if I refer to the big one as A and the wee one as G. This way I can sort of protect their privacy and still sound like I am talking about people with names.
G is the son with the food allergies. He is allergic to dairy products, eggs and peanuts and some tree nuts. We found out about his life threatening allergies when he was an infant and it was quite a shock! None of the rest of us have allergies. Over the years we have learned an incredible amount and tried to face each new challenge with G as our example. He is forever a smiling optimist.