Have her jump up and down.

"You'll go easy on me, right? We've been together for so long. Remember all the good times!" Niki begs.

"All right, Niki. You're an athletic girl. I dare you to jump up and down for fifteen seconds."

"Y-You pervert..." she mutters. "Fine. I can do that. I--Wait a minute. But my hands are still stuck. Let me out, Delphi! It's already the next turn. You gotta free my hands now."

Delphi shrugs. "I don't think I have to do anything."

Niki clenches her teeth. "This is unfair."

Trembling, she stands up on her feet with her wrists still tied behind her back. She's garbed in nothing but a pair of loose pajama bottoms similar to your own. She takes a deep inhale, stares straight down at you nervously, and then her gaze shifts away as if she's trying to forget you're there. It clearly isn't working, since she looks incredibly flushed as soon as she starts bouncing. Her smooth, ample bust jiggles up and down with every leap she takes, and her brave, confident demeanour is gone completely. She whimpers submissively as she continues to hop like a rabbit, and this time, it isn't Eva. Everybody watches, and Delphi snickers. And as it continues, you feel Alice's and fiddle with her fingers along your cock once again.

"Seven seconds," you say.

As she continues, you notice her trousers start to slip. They work down her curvy hips--remaining up by the sheer will of god. They can definitely slip down at a moment's notice. Niki realizes this as well, and she looks down in terror as she continues to jump.

"M-My... Can someone hold up my pants?" she begs.

"That wasn't part of the dare," Delphi replies.

"But you aren't supposed to be able to dare someone to strip!"

"I don't think anyone dared you to do that, sweetie... Uh oh. I think they're about to give."

"Shut up!"

Eleven. Twelve. Time is almost up, and she has to keep bouncing or she forfeits the dare.

"That's fifteen," you say.

Quickly, Niki squats back down to the floor before her pants can slip loose. She looks winded--panting, and not just from the exercise.

She shivers. "Can... Can I have my hands back now?"

"Oh fine." With a snap of her fingers, the rope disappears.

Quickly, Niki covers herself up once again.