I always have a mental image of this happening when it comes to any of the housewives not wanting to participate in something. I'll use Kelli Bensimon since she maintains she was "forced" to go on the Scary Island trip.
KELLI: Andy, I'm not comfortable around those women. I don't want to go on that trip.
ANDY: Well, Kelli, you should give some more thought to that. You might change your mind.
KELLI: No, Andy, seriously. I'm not going.
ANDY: Well, of course, we can't FORCE you to go, Kelli. Let's just take a look at a your contract and see how that might effect your salary for this season or your return for next season, shall we?
KELLI: Well, I guess I could go, now that you put it that way, Andy.
I always figured the insistence on Kelli's part that she was "forced" to go and Andy's equal insistence that she was not forced to go probably goes down something like the above. Yes, Bravo can't force you to do anything...But they can damned sure make your salary and/or contact negotiations perilous if you do refuse.