Great to hear your parents enjoy the award travel in F. However, I had to use my miles for other purpose. I used my miles for my grandpa flying back to TPE after suffering a minor stroke while he was visiting in US. I also accompanied him for the trip. I am glad he is ok now. Anyway, the ticket would have cost $2500 in Y class for last minute booking for one person. Fortunately, UA did have award inventory and gladly spent my miles.
My relatives in Taiwan are very appreciately. Not to take advantage of this bad situtation, but as his favorite grandson I think my grandpa will put my name on his will.