If MrsS wants to charge clients who book and leave I think thats perfectly right and acceptable, given clients should accept they haven't seen her face before booking and if they want to risk booking even though they might not like what they see thats their problem but shes already taken time out of her day and stopped what she was doing to get ready (hair, make up, room preparation etc) for some tosser to run off without paying!
also regarding to her husband taking her calls for her, have started to consider having mine do that also as it certainly would stop the timewasters just calling for a free wank after all, all you need to say is what day, what time and how long/what you are looking to book me for. As my partner is obviously comfortable with me doing this and familiar with it I don't see why the client wouldn't be comfortable with this? All my info is on my adultwork page so no need to keep asking perpetual questions.
Think you guys need to stop being so critical.