This was requested by my big FA brother  kaafan10 as he wanted Khad's entire family in this. Not only that, but Khad's wife's parents as well. I didn't get a chance to draw her parents at the time, but my FA brother decided to ask a request with them in it, so that was helpful. There are a few flaws in this pic, but you all are kind enough to ignore them from the past time so this makes no different. Anyway, Katelyn's father is Karl, he married a women named Kennedy(It's an unisex gendered name, look it up) who happens to be a rebel of the Kat Nebula forces.

Long story short, he helped her, she fell in love with him, and they both had Katelyn. But she couldn't stay for most likely to get caught as she escaped from Nebulian forces. Karl was in the same boat of luck, as he couldn't be confiscated into questioning since he had Katelyn to raise, and Kat Nebula didn't have a day care so they had to wait till Kate was old enough. From a twist of fates; she had her father test her hair machine to give him hair, which worked but gives a different side affect. Kate ended up getting incontinence, as Karl forgot completely about Kennedy. Now the forces couldn't do anything as Karl and Katelyn were safe. Luckily after the Kommander turned good, Karl started remembering Kennedy again, and the rebels were free to come back to Kat Nebula and rejoin their family and friends. Kennedy was happy to be back with her family, apologizing to Kate for leaving her and her father for so long, but Kate forgave her, after a while. But to really seal the deal in her apology, Kennedy used the hair machine that Katelyn managed to have a side affect dial in order for the machine to work, and made herself incontinent for her. Kate was not only shocked, but happy and hugged her mom for how meaningful she really was to her word. Karl wore diapers alongside Kennedy, just to make her happy about it.

So that's their story all done, now to explain what they are doing exactly.
Khad is checking Kassie's diaper, as he then got checked my his mom Karen, making him embarrassed. Jeremiah came in, holding Nigel as he finished getting him dressed while Mia was riding on his leg throughout the trip. Kade was holding Luke on his shoulder for the pic, till James snuck underneath his torso, making him surprise and lift his leg for James to have room to pounce on Leo; who was sowing Karl and Kennedy his latest invention, as Karl seemed to be impressed with his wife Kennedy. Finally we have Emma wanting to do a diaper rump bump in a super thick diaper, so Katelyn decided to get changed into a super thick diaper as well, and rump bumped her daughter at the flash of the photo.
Hope you enjoy.