Pinkie Pie added the final flourish to the last cupcake. A large array of them stood before her, each one uniquely decorated and arranged on trays. The kitchen around her had been rendered very messy by the effort she put into the cupcakes. She herself had gotten rather liberally coated with a variety of the frosting.
Deciding that cleaning the kitchen can be left for after sharing the fruits of her labour with her friends, Pinkie picked up three trays. One balanced on her head while the other two being carried a bit more traditionally on her hands.
Exiting into the hallway allowed Pinkie to hear the crying of Flurry Heart. The smile on her face faltered microscopically at the corners of her mouth, both in the duty she had taken on in agreeing to help foalsit as well as because she had used up all the milk for feeding said foal.
Her thoughts distracted her enough she didn't register that the crying was getting closer.
Taking off down the hall so she could deliver the cupcakes amongst her friends, Pinkie was slammed into by a much smaller and lighter toned pink blur.
Skill in carrying delicate treats had allowed Pinkie to not drop a single cupcake as she stood back up. Looking at the wing that was draped over her shoulder she traced it down to the to body of Flurry who was using them to hold herself onto the much larger mare.
"Hey Flurry!" Pinkie Pie started off cheerfully "Sorry I used up all your milk in baking these cupcakes. I know they're delicious and nutritious but being such a young foal you sadly can't have one just yet." She continued as magic enveloped her shirt turning it to shreds.
Flurry latched onto a nipple as Pinkie stated "I don't have any milk in there. If I did, I'd share with you, and it might even make taking care of the Cake's twins easier too. Then I could also use my own milk in baking and I wonder how many people would like to have those cupcakes."
Pinkie started getting lost in thought as she rambled on about what she could do if she was lactating herself. She barely noticed Flurry letting go of her breast and came to just as she was off down the hallway. Shrugging she turned down a different hallway and began to travel down it, keeping the cupcake trays securely balanced despite all her bouncing*.
*) Her tail and hair have been known to bounce even when the rest of her body was perfectly still. A small theory held by Twilight was that even if Pinkie Pie was turned to stone they would still bounce despite the impossibility. Of course without her shirt Pinkie had more stuff bouncing than normally.