I actually am interested in the lives of SPs and like to talk to them about a variety of things, and I have no reason to think that most of what they tell me isn't true. I'm sure some of them would lie to keep a regular or get more money out of a client or whatever, but they hardly ever say anything that would be remotely useful in advancing any such agenda. However, they rarely tell me much about the present topic, perhaps because they know I'm generally not interested in it; it disrupts the GFE illusion for me if they talk about their boyfriends/husbands at all. Still, I know one who mentioned a couple of ex-boyfriends that she'd tried to keep her work a secret from, who eventually suspected and harassed her to try to find out for sure and to try to get her to quit. So, unsurprisingly, it seems that some SPs hide things from their real life romantic interests. And some of them surely have pimp boyfriends, as others have mentioned. But to me it doesn't seem that hard to believe that some are honest about their work and have successful relationships anyway. Not everyone has the same hangups about this sort of thing; certainly not to the same degree.
As far as what SPs think of clients, they tell plenty of stories about their bad clients. Do you act like that? If not, you're probably not one of the bad ones. They also have good clients, but of course they will say you're good as long as you're not bad (and maybe even if you're bad, but you can tell pretty easily if you're bad by listening to the stories, and if you're a bad client odds are you don't care). Thus, you probably have to take an interest in them and pay attention to how they're feeling to be able to tell if they're sincere in telling you you're a good one. What the proportions are of good, bad and in between I obviously don't know, but for one thing it would be quite surprising if it didn't vary a lot from SP to SP. It probably also varies a lot from SP to SP the extent to which they tolerate or dislike the in between clients.