Applejack giggled. “You are so cute, Rainbow.”

Rainbow Dash could help but to gush a blush and giggle to the such that AJ mentions.

"Okay, Rainbow. I was going to let you take a bath, but I realized that it is better for you to not be in the tub right after eating. Do you want to watch some movies?"

“That does sound nice. … but can I have a breast feeding session with you first,” Rainbow Dash asks. She doesn’t act this way but she is a little frustrated.

"I cannot lactate, so no," Applejack said, sitting Rainbow down in her room.

“Lactating isn’t necessary. I just want the bonding,” Rainbow Dash explains to her girlfriend.
She realizes that she is back in her room. Was she oblivious to the tv in here?

Applejack turned on the projector. “I guess I will hold you in my hooves. Just a reminder that you are being punished. Tomorrow, I have something else planned for you.”

Rainbow Dash looks at Apple Jack with a wince, “Love being stuck in this dirty diaper has felt like a punishment this whole time.” She snuggles up to AJ hoping she would be the first to kiss her this time. “So you’ll be off tomorrow,” the sky blue pony asks as she warms up in AJ’s brace.

“Actually, because of you, I have a lot of work to do. But Twilight gave me a potion to help me with the next part of your punishment.”

“Ahh, this is turning to a punishment by royal decree,” Rainbow Dash said spooked and imagines the possibilities.
Will she loose he bowel control?
Will she be turned into a dummy?
Will she turn into a filly again?
Will she be wingless?
Will she turn into a doll while Apple Jack works all day?
Will she turn into the size of a hoof?
Will she be turned into a frog?
“I take it she was disappointed with my actions,” Rainbow Dash asks while returning to her indoor voice. During all of this it was nice to be cuddled by AJ as the movie plays.
RB’s tummy squeals as she uses her diaper again. She tears up and slightly twists and turns wanting to resist this feeling but doomed that she can’t.
The sky blue pony looked up to her girlfriend with tearing eyes, “Why won’t you kiss me?”