Look to her.

As she sits on the ground, her face doesn't look like one of defeat. She's smiling.

"Are you okay?" you ask, though with little concern.

She drops the expression immediately and blushes. "Yes. Of course I am. I just, um... grew weak from the tickling is all. It was a little more intense than I expected. She did so with experience. Those fingers... ticking all over my skin... s-so helpless... And, don't worry about me! I'm just fine."

As she stands, she does so with wobbling legs, and a hand between her legs. She shivers.

"Are you fine though?"

"Of course I am!" she replies.

"Really? Because it looks like you just--"

"Shouldn't we be getting to the Adventurer's Guild?" she cuts you off nervously. "Y-Yes that sounds good. I'm so excited to start this party with you. Just imagine. We can go out and slay all sorts of monsters together. Ones with swords for hands. Daggers for eyes. Maybe even ones that tickle people into submission. There's no time to lose."

She's just completely denying what just happened. And I don't know about monsters that tickle people...