She’s clearly drunk. Seen it too many times.
I worked in a big city ER for years.All ERs have their regular patients..."frequent flyers" we called them.Many of our frequent flyers were drunks and although they were usually drunk when we saw them occasionally they'd be sober.The difference between drunk and sober was sometimes dramatic.
This women may very well be a jerk when sober but my experience tells me that that's not necessarily the case.