Under my umbrella

During the last song at a public jazz concert, the ones with umbrellas got up to dance. Ilona and Helmut smiled and twirled along to the dixieland tunes. When the music stopped, I asked to take down their names for the newspaper. Ilona did all the talking, said that her husband has Alzheimer's, but that he won't miss a beat. They've been married for forever and want to stay that way for life.