To be honest, you may be better taking it up with the shop or facility she used, to exceed 3 hours you must have been in somewhere for quite some time, each outlet can usually access the system themselves, on the day, they can log you as exempt and after the event they can usually still submit notes, we occasionally forget to get logged and get a Pcn and most get overruled, but they do want to see proof why you overstayed, receipts may even help if she spent a few bob.
Round here the cinemas, Bingo etc even Lidl have a keypad on entry in the store where you can log yourself as they want your custom and many people want to take in a meal and a film.