Harriet sat at the desk in her room, just starting her schoolwork, when she heard the door of her room open.
She turned around, and saw Kim standing in the door opening, holding the weird remote she didn't realize fell out of her bag.
"Kim? Wait, is tha-" Harriet started, but Kim already pressed some buttons.
Harriet fell silent, as her clothes seemed to expand around her, her room seemed to get bigger, and her little sister seemed to get more distant despite standing still... as she was swallowed by her own sweatshirt, it hit her.
She was shrinking!? Before Harriet could collect herself, she felt herself being lifted, still wrapped in her own clothing, shaken about as Kim skipped over to her room.
She heard a door close, and as light returned in her fabric prison, she found herself staring at the billboard sized face of her suddenly not-so-little sister. She was at most four inches tall right now.
"KIM!" Harriet said, trying to cover her modesty with her hands. "What did you do to me!?"
"You're gonna keep your promise." Kim answered, picking up Harrier by wrapping just one hand around the shrunken girl's waist.
"Kim! Turn me back to normal right now!" Harriet struggled in vain against the giant chubby fingers of her little sister.
"No." Kim smiled, dropping Harriet's sweater, and skipped over to her dollhouse. "I'm gonna play dollies, and you're gonna be the doll."
"You can't do this! I-"
Kim cut her off by squeezing her and holding her up to her face.
"I'm the big sister now. That means I'm the boss of you." Kim blew a raspberry, covering the tiny Harriet with some spittle.
After being tossed and shaken by her skipping sister, Harriet was dropped in the dollhouse.
Getting back on her feet, she looked around the room. It was mostly empty, except for some doll's bed and closet.
She turned around, and was faced with Kim's giant smiling face blocking any view of the room behind the dollhouse.
In her left hand, she was holding the weird remote.
"Kim, turn me back to normal right now! You'll be in so much trouble when mom finds out!"
Kim just pointed the remote at Harriet. The message was clear: do what she says, or else.
Harriet took a step back, and couldn't think of anything to say anymore.
"Good! Now we're gonna play." Kim said, and picked up a little box from the ground, and held it up to the dollhouse room Harriet was in.
It were doll-clothes. "We're gonna play dress-up!"