This story obviously predates the obnoxious airline security measures that require passengers to show ID. Even minor children have to have boarding passes with their names on them these days.

Maybe if Jason had a more androgynous name it would work, or if they had a really long last name so the first names were truncated, and she said "Jas" was short for Jasmine or something.

And Mom not letting Jason wear Sarah's jeans seems unnecessarily cruel. I think it would work better if the only pants she'd packed were girlier than any skirt, like hot pink stretch capris or lavender cargo shorts or sweats that say "Princess" across the back.