𝗪𝖎𝖗𝖊𝖇𝖆𝖑𝖑
I'm guessing Celestia said "I'll be back in an hour, don't go anywhere" and let her cool her hooves for an hour or so before showing up with the desserts.
||(You wouldn't want to immediately bring up desserts during a punishment)||
||(You wouldn't want to immediately bring up desserts during a punishment)||