Baby Cakes

S2, E13: The Cakes have a pair of twins: Pound Cake (a pegasus) and Pumpkin Cake (a unicorn). A month after their birth, the Cakes are forced to ask Pinkie Pie to babysit the pair while they cater an event. Pinkie, initially elated to be able to play with the babies, finds they are much more difficult to tend to, but refuses to accept Twilight's help believing that she can show responsibility. However, when the twins later exhibit their flying and magic abilities, Pinkie can no longer control them and breaks down in tears. The twins realise their mistake and cheer Pinkie up. The Cakes return to find everything is fine, and offer Pinkie to be their go-to babysitter in the future, which Pinkie accepts after hearing the twins say her name.