You're quite right, it was tricky and rather awkward. But she managed, and it saved her from the embarrassment likely to have occurred had she stood up. It held for the rest of the meal and exit to the car, where it was... replaced with a fresh one... Your imagination can surely fill in the details I've left out. :-)
Been there done that more than once (afraid to stand up), but she’s one up on me, getting it on at the table. Whew.