Downfall/Accept the challenge
From Create Your Own Story
Challenge accepted. You agree that the loser not only was to be the winner's slave for tomorrow, but also had to unpack the winner's luggage, as she would have to do so tomorrow anyway (and it'd be more convenient not to have to wait until then).
"Voluntary early service encouraged," Kirsten says.
"Do it if you like," you reply. "If you can move again by then."
"Bring it," she says. You struggle to get your hands free. It takes you longer then expected, but when you escape Kirsten's grip, there is nothing she can do to stop you. While fighting off her arms with one hand, you slip the other hand in her shorts. Your palm glides over a blank cheek, which means she must wear a thong. You search for the waistband, ready to grab it, and... huh?
"You have got to be kidding me," you say.
Kirsten snickers maliciously. "Now where's that wedgie you wanted to give me, bigmouth?" she asks. You grunt and let you hand wander around to get confirmation that she doesn't wear any underwear. She doesn't. All there is under her cut-off jeans are her ass cheeks, soft on the surface and firm underneath. You pinch her in frustration. Your sister squeaks and laughs. "You're my slave tomorrow. Say it."
"You tricked me," you say instead.
"No, I didn't," she replies.
"Yes, you did," you say.
"Did not."
"Did so!"
This goes back and forth until Julianne orders you to stop your silly behavior.
"Say it!" Kirsten demands.
You have no choice. "I'm your slave," you say. You will get back at her, you tell yourself while taking your hand out of her shorts.
"And how," she says pensively.
