Kim is wearing a tiny little pullup diaper. Her Daddy is trying to potty train her, so she doesn't have a big diaper on like maybe she should. The problem is that really needs to poop, and knows it's going to be a huge one.
"OMG. I gotta go so bad. I don't think this diaper's going to be able to hold it all."
She admits that Daddy wanted her to use the potty, but like lots of little girls she doesn't like the potty, and even though she knows it's going to be really messy, it's obvious she's just going to wait until she can't hold it anymore and then just fill her pullup like a big baby. She really tries to hold on, but it's no use.
And fill it she does! When she finally can't hold it any longer, he tiny pullup is filled to the max with poop and sags heavily in the back, hanging down between her thighs from the weight.
"It's so warm and squishy and wet! It feels so good!"
Even though it really smells, and she's a bit grossed out by what she's done, Kim has made such a lovely round bulge of poop. She runs her hands over the mound of poop to feel just how big it is. But even as she's doing that, she needs to go more, and is worried that the diaper might actually explode! It doesn't though, and manages to hold as much poop as Kim can do.
Then it's time to take her pullup off and reveal the poopy mess inside. And she needs to clean her dirty bottom too before putting on a new clean pullup. Afterwards she holds the old rolled up loaded pullup in her hands (and even sniffs it!) and is amazed at what's she did.