No, she can't be late

Jessica shakes her head. Ms. Haythers is ruthless, and she's already been late a few times. She walks a little faster, hoping maybe she'll have enough time, but she arrives juet before the bell rings.

She sits down at her desk, her bare pussy throbbing. She glances down at her crotch, her skirt barely covering her womanhood.

Ms. Haythers enters the room, a busty woman will a stern attitude. She announces to the class,

"Alright, today we'll be going outside to measure the field. You must stay in your assigned group the whole class period. Make sure you do quality work."

With that, everyone stands up. Jessica gulps and stands, a few drops of pee falling onto her seat. She freezes and considers her options.

Should she ask Ms. Haythers to use the restroom, or should she keep holding it?