Well, I don't know what you should do, but I can tell you some things I've tried that definitely haven't worked. These weren't really in regards to the therapist, but other stuff that was wanted (sweets, to go to bed instead of studying, stuff like that). I usually get cranky at some point and nice(ish) Susannah turns into mean, abusive Susannah. I usually tell them they're bad girls - that's a staple. I dig around for bad things that happened in childhood and tell them those things happened because they were bad girls and if they don't stop [insert problem behavior], maybe it will happen again. Recently, because of the season, I've threatened to cancel Christmas, give them coal, etc. At best, that gets me a few minutes of quiet, then all hell breaks loose and **** hits the fan.

So yeah... if you crack, try not to be like mean Susannah. It will only make things worse.