Several years after Phineas and the others went off to college, he and Isabella had married, had a daughter, and moved into his parents house after they retired and moved to Florida.
"Maria and the others outside working on a new project?" asked Isabella as she did the dishes.
"Yeah, which means we'll hear one any minute," said Phineas. An explosion then shook the house.
"Nice timing," said Isabella. The two were used to this so they didn't rush out to check on anyone.
"That's it, I'm done!" said a boy's voice from the backyard. At this, the two ran outside for the voice belonged to their nephew, Thomas.
"Thomy, where are you going?" asked Maria as she watched him head for the gate. The two of them and all of their friends were covered in smoke from the explosion.
"Home, I'm sick of being caught in these explosions!" said Thomas.
"Dude, you don't have to act like it's her fault," said Danny Johnson, Candace and Jeremy's son.
"But it is, I asked Aashi and she even agreed that my builds are fine, it has to be Maria's programming!" said Thomas as he pulled what looked like a remote out of his pocket. Aashi was the daughter of Baljeet and Ginger.
"Don't expect me back," said Thomas before pressing home on the remote. This opened a portal to his bedroom back in the U.K.
"He's right," said Maria as she slid down the side of the house. By this point, Phineas had gone to call Ferb.
"That's not true, Thomas is just upset and didn't mean any of it," said Isabella as she sat down next to her.
"But he is, I do keep messing up the programming of our inventions," said Maria, surprising everyone.