Bad Manners and Brimstone

To our knowledge she didn't return this past weekend.

We're hoping she just wanted to get the "last word".

It did sound like that to me. If I read your initial post right, the manager went on leave shortly after the first incident, and wasn't there the next few times they came in. So she and her friends kept coming back because she wanted to show him (or, perhaps more importantly, her friends) that she wasn't scared of or impressed by him. When finally she sees him, she does her little bit of childishness, and feels she's 'got even'. End of story.