There are some religions that introduce themselves to vulnerable people, by parading a happy family in front of them. The sub-text is: you too can be this happy, if you join our religion. I can't comment on the motivations of these people, as I've only met a very small number. However, I think that the whole thing would be far more meaningful, and more in keeping with the central message of these religions (love thy nieghbour), if help was given unconditionally. Only then, when the troubled and vulnerable are stronger, should they be encouraged to join the religion.
Meanwhile, back at the fantasy. Getting ideas from another couple could help those new to the chastity fetish get a head start. It would certainly ease the burden on the budding domme.