Gumball, Darwin and Anais were all at school, and Anais headed towards her class, before Gumball stepped in front of her, stopping her.

"Wait, little sis! Don't forget this!" Gumball pulled out a diaper. "We wouldn't want you to have another accident."

"Yeah. Better safe than sorry!" Darwin pointed out.

"Very funny." Anais sarcastically stated. "That was one time. There's no way it's going to happen again, and just like I said when Mom left you in charge, there's no way I'm wearing a diaper!"

"But you had like three glasses of water today. You'll be ready to spring a leak at any moment." Gumball mentioned, thinking back to that same morning.

"That's because you forced it into me when you thought I was munching too much on my cereal, when I wasn't!"

"You needed something to wash it down, didn't you?" Gumball stated, shrugging a bit.

Darwin raised his arms in cheer. "Yeah! Wash it down!"

Anais shook her fists in anger. "You two are the most mentally stupidest brothers ever! You're lucky to have me to balance you out! Our whole family is lucky to have me!" she yelled in anger.

Gumball and Darwin blankly stared at Anais' remorseless face, before looking down, burstng into laughter as the started laughing their butts off.

Anais looked down, much to her horror, there was a yellow puddle of urine around her, causing her to cry as she ran into the girls' bathroom, having had another accident.

"Anais may be the smartest member in our family, but she's still too dumb to not have any accidents!" Gumball stated in laughter.

Meanwhile, Miss Simian walked out of her classroom, seeing the yellow puddle and Gumball and Darwin laughing their guts out.

"GUMBALL!" Miss Simian yelled, prompting him and Darwin to stop. "Clean up this mess!"

"But I didn't-"

"NOW!" Miss Simian pulled out a tiny mop, causing Gumball to groan as he took the small mop and started cleaning up the puddle of urine, as much as he detested it.

Darwin watched Gumball, then he slowly proceeded to walk away.

"You two, fishy!" Miss Simian took out another tiny mop, causing Darwin to also sigh as he reluctantly helped Gumball clean Anais' accident.

Meanwhile, Anais watched from inside the girls' bathroom, giggling in a devious manner. "Silly Gumball! Foolish Darwin! I'll always be one step ahead of you both!"