Diapered by the little sister

Part 2

Your sister clicks another button and some supplies appear in her arms. A huge thick diaper. Some plastic pants with a lock. A pink short, dress. I grow horrified and try to move but I can't.

She grins and comes up to you. "This button will let me hypnotize you. Only I don't want to hypnotize you to use your diapies so I will do that my own way."

"Lay down baby." I lay down even though I don't want to. It's like I can't control my body anymore. She starts to pull down my leggings and rips off my panties. "You won't be needing these anymore, hehe." I just lay there in shock. She pulls out the thick diaper and says," Lift your butt baby." 

She slides the diaper on your butt and grabs some baby powder. As she sprinkles it on, I say," Your wasting your time. I don't need diapers and I definitely won't use them." She then says," Is that so? We'll see, hehe."

She clicks another button and says," A  test run. I will use laxatives next time."

I grow confused at her words. What is she-

My stomach starts to contract and she quickly tapes up the diaper and put the plastic panties on. She locks them with a padlock and puts the key somewhere.

She looks at me with an evil grin and says," You will use your diapees. I'll make sure of that."

This thick diaper is so big. It spreads my legs apart. I can't close them.