JA effectively creates her own reality by manipulating others' perceptions of empirical reality.
This is why when she's faced with some fact or detail she that hasn't anticipated being confronted over, she blurts nonsensical falderal.
She needs time, careful planning, and enough control (speaking time, at least) in order to effectively influence others' perceptions of reality.
When she's knocked off her game, her composure is significantly altered.
It's fun to watch justice beginning to publicly weigh on her, expressed in her sudden changes in demeanor.
Yesterday, when JM would move from an unpleasant detail about which she was visibly squirming to a different point in time -- another date, for example -- she would noticeably perk up, smile and seem to have regained control over the rehearsed accounting of events and details.
Quite instructive on a number of levels...