Option one.

You can't imagine walking around the park with a skirt on but no panties. Having this pair rub against you was bad, but that would surely be worse, especially with Alison here. You quietly mutter your choice of the first option and she nods.

"Alright! Let's keep going then." She gestures for you to follow, and you both begin to walk again. You groan. It feels great, and you really wish it didn't.

"So," she says quietly beside you. "How does it feel right now? Does it feel like somebody's fingering you every time you step? Oh... I don't know how you're holding onto your composure right now. I bet you just want to be home right now, getting rid of all that pent-up pleasure."

You nod, biting your lip softly. You don't think you can walk for much longer, and you swear she keeps moving a bit more quickly so gradually that you hardly notice. You look left and right, eyeing all the clueless people that would be so quick to look over if you were to moan... but you want to so badly.

"Keep up!" she says, moving even faster. You pant more and more as the feeling builds up. You couldn't stand to orgasm in public again, but still. You're so close. You can't resist much longer. It's coming... You can't hold back any more!