Refuse to let them undress you

"No way." You say, storming out of the room. "I'm not letting you treat me like a baby girl."

You make your way down the stairs and out to your car. Starting the car, you realise you can't leave without Amanda and you have nowhere to go anyway so you just sit in the driveway with the engine running.

You aren't sure how long you've been staring blankly through the windshield when you see Amanda come out the front door. She climbs into the passenger seat.

"Did you know she was planning this?" you accuse.

"No. I promise I had no idea." She says. "I was just up there trying to talk her out of it."

"Let me guess, you couldn't." You say.

"Sorry. Living with her was our last resort and she knows it." Amanda says. "Please come back upstairs and play along. Maybe she'll get bored of this."

"Fine." you turn the engine off and follow Amanda back into the house and upstairs.

"Have you decided to be a good little girl?" Janet asks.

"He just needs some time to adjust." Amanda says. "Why don't you let me get him dressed up?"

As Janet considers this, the doorbell rings. "Okay. You take care of your baby sister while I get the door." Janet says. She quickly takes out a giant fluffy white cloth diaper and a pair of translucent pink plastic pants from under the changing table. "Do you remember how to fold cloth diapers?" She asks Amanda as she crosses the room to the wardrobe.

"Yes Mom." Amanda reassures her.

Janet selects a t-shirt, the same shade of pink as your plastic pants. Printed across the chest are the words "Mommy's little girl" and hangs it on the wardrobe door before leaving.

Amanda shuts the door after her and then helps you get undressed.

You can't help getting aroused as she removes your t-shirt and jeans. By the time she pulls down your underpants, you are fully erect.

"We should do something about that." Janet says, suggestively.