Originally Posted by
garykung
No offense - Just because you have done that many times, it does not mean it is allowed.
In fact, I was once stopped from trading a CPU seat. However, it was eventually allowed as the person was my companion and next in line for CPU.
I've semi-frequently traded CPUs with other people I knew on the flight. I've never had any issues with it. I suppose maybe that's a little different than upgrading a rando. But I can't see any circumstance where an FA is going to object to you trading your CPU to your spouse.