The twins, who are still in pain from having been spanked, are sulking in timeout, and they are afraid their parents won't trust them again. They promise not to play flushing games anymore.
The "joyboy" gets retrieved, but it unfortunately no longer works, but the Mashes return and Button has gotten a new one. He then apologises to the twins and promises to teach them how to play video games when they're older. The twins apologise in turn for flushing his joyboy, but Pound begins to feel sad about growing older because of Button's comment on the future.
He wakes up at night almost crying and tells Pumpkin about how he is afraid of growing older. He decides that the only way he can stay a foal is, much to Pumpkin's annoyance, to go back to diapers, so he puts one on and falls asleep feeling rather guilty.
He wakes up again and uses his diaper, for number two no less, then Pumpkin puts on a diaper and she too soils it. She says, the next morning, that while she doesn't like using diapers, it's worth it to make her brother feel happy.
They go into the bathroom and begin reminiscing about the events before and during the story, then they change each other back into pull-ups.
This chapter provides examples of
- Bittersweet Ending: The chapter concludes with the twins sad about growing older, but happy at the same time.
- Death Glare: Mrs. Mash hurries Button up for his apology by glaring at him.
- The Diaper Change: The twins clean each other up after messing their diapers.
- Downer Beginning: The chapter begins with the twins sad in timeout and the parents having to deal with an angry customer.
- Fun with Flushing: Defied. The twins decide to give up their flushing games.
- Gamer Chick: Discussed when Button wants to teach Pumpkin (along with Pound) how to play video games when they're older.
- I Don't Think That's Such a Good Idea: Pumpkin is initially none too keen on the whole "using diapers" thing.
- Never Trust a Title: The chapter is actually about the twins worrying about growing older, not about them hitting puberty or turning eighteen.
- Pain to the Ass: The chapter begins with the twins' butts still feeling sore.
- Series Fauxnale: This chapter has "end" in its title, is sombre, and has a series of flashbacks, making it seem like the finale, but really it's the penultimate chapter.
- Tears of Joy: The twins cry tears of pride when Pumpkin temporarily sacrifices her dignity for Pound by using a diaper.
- Unexpectedly Dark Episode: Downplayed. It's a happy chapter, but with a deep theme of ageing and familial bonding, a downer beginning, and hardly any jokes.
