An act, in and of itself, isn't provocative....or at the very least shouldn't be considered provocative unless it was meant to be provocative. She could very well have been doing it because she thought it was a silly thing all the girls do at the Residential Treatment Center (RTC). She could have done it to be provocative. She could have done it to be silly but with the nagging knowledge that it might be considered provocative.
There are lots of actions that can be quite provocative in some situations but which aren't in many other situation. A woman licking her lips comes to mind.
I didn't see what she did, but I don't think it's unusual for kids (girls, more so as they get older) of most ages to wiggle their bottoms nor do I think it's generally a provocative behavior.
