She is obviously a liar. She is claiming THIRD degree burns?
Third Degree Burns are areas of flesh blackened by intense heat. Beyond the Second degree burns that involves blistering there is third Degree Burns that can only be caused by temperatures FAR in excess of 212 degrees.
Worst case DD coffee was at 180, and that number is really suspect. No was is this a third degree burn case. It is only a third degree case.
The lady from the infamous McDonald's coffee case suffered third degree burns over 6% of her body. At the time, McDonald's policy was to keep its coffee at 180 degrees (hotter than the fast food joint average).
I think experts in that case said that 150 was a good temperature at which coffee burns are minimized because the coffee cools fast enough on contact to avoid serious injury. Anyone keeping coffee hotter than that is endangering their customers.
I don't know much about this particular situation. Maybe the lady is a lying money-hungry crazyperson, I can't say. But it is entirely possible to be seriously injured by coffee burns from needlessly, stupidly hot coffee.