Rainbow immediately slumps in her chair moaning happily.

“Oh man, it feels so good,” she says. “In fact I think I’m gonna….” She’s cut off by a hissing sound as she wets her diaper.

“Rainbow what is wrong with you?” Applejack hisses, though she’s struggling to gold back her own moans at the vibrations.

They reach the edge again and the vibration stops. "Now, will you two be good?"

"I'll do whatever you want Twilight," Rainbow pants.

"I...I...," Applejack mumbles, clearly weakening. "SCREW YOU!" She finally shouts.

"If I get her to behave will you let me orgasm?" Rainbow says, pointing at Rainbow Dash.

"Well... no. You have to be on your best behavior for the whole day if you want to orgasm. Now, eat your num-nums." Twilight said, holding spoonfuls in front of both of them.

"Okay," Rainbow sighs, and obediently takes the spoon.

Applejack takes hers, but immediately spits it back right in Twilight's face.

Twilight wiped it off. “You better not do it again or you can forget about cumming today.” Twilight said angrily.

"But I'd still get to cum right?" Rainbow whines. "I'm being good."

"You both disgust me," Applejack grunts crossing her arms and sticking her tongue out at Twilight.

"Yes, you would." Twilight said.

"Yay!" Rainbow says, before sticking her tongue out at Applejack and then opening her mouth for another spoonful.

Applejack merely grumbles and turns away, though she does start to squirm a bit in her wet diaper.

Twilight gave them both bottles after all of the food is gone.