This is an interesting post as I faced the same question yesterday when returning from Antigua with my wife. I got the upgrade out of ANU but was unable to get her upfront with me. Yes, I offered her the seat but she graciously declined knowing I would be miserable in her seat (I am 6'4"). I did go back to see if she wanted to switch, but she declined. Now reading after reading this thread I dont know if I would consider it again.