Just wait it out.

You briefly consider fingering yourself right now, below the table, but you can't start thinking about orgasming in public again... Especially not willingly. You adjust your skirt and underwear strategically and stay sitting, waiting. The sensation would die out eventually. It takes a few minutes for the four to return to your table with trays of food, and by then, you're feeling confident that you can cast normal. Your cheeks are probably still red, and you're still very sexually frustrated, but it's just a meal. You can make it through.

You start eating the burger, and your friends talk about various things to each other. You chime in once in awhile, but seem to rather not draw too much attention to yourself right now.

But then you feel her fingers again. She's actually reaching under the table, as she's sitting beside you, and stroking your leg. Nobody can see what's happening either. You're again at her mercy, and she slowly moves her fingers higher each time. Was she willing to bring you to an orgasm right here, right now?

Her fingers touch the front of your panties and your jump shakes the table slightly. Alison just smiles.

You're already so close, so this touching enough nearly causes you to cum. You wipe a bit of drool away from your lips, hoping others assume it's from the deliciously unhealthy McDonald's burger.

"Hey, Jane," she says, though not stopping her touching while she talks. "I'd like to use the girl's room, but I don't like going away alone. It makes me feel awkward... Wanna come with me?"