"Fine, you don't believe me, I get it," you say to Ali. "I guess I'll just have to show you how real this thing is."
You turn your head towards the staircase at the back of the living room and let out a howl.
"Hey, Katie! Get down here, I need your help!" you yell. A flurry of pounding footsteps echo through the floorboards above as your step-sister stomps her way across the house. She descends the stairs with an annoyed looked splayed across her face.
"Ugh, what do you need?" she asks with a tone of indignation. You don't even bother to give a response. Instead, you raise up the size ray and point it right at your sister. Turning the knob, you lower the threshold to 2 percent. The whirring begins again and without hesistation you pull the trigger, bathing your sister in the neon green beam. Like the couch, she hastily shrinks downwards and inwards, and before long is reduced to a two inch version of herself.
"Holy crap!" Ali screams, "you weren't joking!"
Overcome with excitement, she hops off the couch and approaches your step sister. She swipes the cowering Katie from the floor, letting her stand on her flat palm.
"Told ya it was real, Ali."
"W-what the hell did you do to me?!" Katie yells, her voice barely audible.
"Isn't it obvious? Your step-brother shrank you, you idiot. Not so big anymore, are ya?" Ali taunts. She begins to prod Katie with her free index finger, running it up and down Katie's form. She has an expectant look in her eyes, ready to torment the little person in her hands. As fun as it would be to see that, you don't really trust Ali enough to not harm your step sister.
"Alright Ali, put her down, I'm gonna change her back," you explain.
"Hmmph, that's not really fun. We haven't even done anything!" she whines. "Haven't you ever wanted to get some payback on her?"
"Well, yes, but..."
"But what? She's just gonna be pissed when ya change her back anyways, so why not give her a reason to be mad?" Ali reasons, rubbing her thumb up and down Katie's body. She follows up by prying off Katie's t-shirt. She tries to fight it, but there's little the two-inch woman can do to fight it.
"H-hey, leave her clothes on!"
She ignores your pleas, reducing Katie to her bra and panties in no time. You don't admit it, but you can't deny that you enjoy the exposed image of Katie. With a decent pair of c-cups, she's got a curvy figure of her own.
"Now then, I think we're ready to begin," Ali says. She walks over to the living room's cupboard and reaches inside, pulling out a box of monopoly. She opens the box, taking out a single die from the set. She displays it to you and explains its purpose.
"Let's roll a die to see what's happening. One or a two, and I'll stuff her down my shirt. Two or three, she can go in my panties. Five or six and she's gonna spend some time in my mouth."
With a flick of her wrist, she lets the cube fly. It bounces on the coffee table, before finally coming up...