She got to fly after all:
"Keith asked her to go home, change and take a later flight. She refused, citing her appointment. The plane was ready to leave, so Keith relented. He had her pull up her tank top a bit, pull down her skirt a bit, and return to her seat."
I think Keith was just in a bad mood because he put on a few pounds and the Little Black Dress didn’t fit him anymore...
Keith is probably just jealous that she looks better in a miniskirt and heels, better than he does.