stick her fingers in your butt (in prep for Kim)

Original Author: Starlock

"Alice! Put me down!!" You shout, but Alice ignores you, instead tearing off your tiny clothes, and looking down your tiny body interestedly.

"Hehe, your penis is so small Willy" She mused, prodding at the area between your legs.

"That's because you shrunk me!" You yell to your sister, feeling just a little insecure.

"I know that! But even if you were still normal sized me and Kim are way bigger." Alice turned you upside down in her hands, observing your nether regions. You give a loud gasp as she inserts her pinky finger into your butt hole.

"AAah! Alice, what are you doing??!?!" You scream.

"Just having a bit of fun with my new toy." Alice smiled, sliding her finger in and out of you, eventually trading her pinky for her index finger, then both index fingers, as you groan in pain.

"Alice, stop it, please!" You shout. "You're stretching me out!"

"I know, that's the point." Alice said as if it were the most obvious thing in the world. "This way, you'll be at least a little bit prepare for what Kim and I have in store for you." She seemed to get a bit of a hard-on watching your asshole get more and more stretched out.

Alice continued to play with her miniaturized older brother like a toy, until....