I tried giving a single UG to Mrs. Lee exactly once. Her reply was that I was the one who spent all this time in planes, so the lone remaining FC seat should be mine, not hers.
Out of courtesy I still offer it to her on each of the rare occasions we are flying together and are in line for the one remaining seat, but it's the same answer every time.
Also, this type of thing isn't really a crucial factor in the success of our relationship. It was a 15 second discussion one time several years ago and I don't think it's something we've found worth talking about since.