The above was my suggestion early in this thread, and it was shot down for good, understandable reasons. But with so many posters focusing on whether she should continue playing, I again suggest that perhaps she should consider turning it around and having him play while she doesn't. He would ultimately understand the pleasure and fulfillment of letting one's partner be sexually free.
To me, being in the lifestyle, whichever way a couple gets there, is important to a high level of happiness. Knowing what I know now, if I were back at the beginning of my relationships, I would do whatever it would take for us to get there.
Please test my theory again.