Little Richard will give way to easy listening. In a decade she won't even slightly resemble the lissome damsel he married. She won't like his friends unless they're boring. The fun and excitement will fade and life will be just life. Charm has a short shelf-life.
Some women are great that way.
One was reported in San Francisco a few years ago, and I know of one in Canada. But Willy Bill probably won't marry one. However, the overarching aspect of marriage, the one that ought to be part of the dictionary definition, is that Sally will get the children. She'll get the house too, but the world is full of houses. The kids are the killer.