My husband and I both are status holders on an airline and have flown first class many times on upgrades. An issue arises, however, when we fly together. It started last year when, based on check-in time, he was offered an upgrade to first class and took it, leaving me sitting in coach without even a thought. I had a pounding migraine and was very ill. 
I did not want the upgrade; I wanted him to sit with me…