Upon hearing someone coming, She jumped into a potty. Jumping into one of the smaller ones, she removes the diaper, giving her just enough room to be covered by shadows, taking the chance to dump the contents into her diaper while she's in there.
Jeff, unaware of what's happening, is suddenly hit by a slide of urine and poop as it goes in, before it goes dark again. (What could be happening out there??)
Meanwhile, an employee walks back there with one of the children. Once they reach the smaller one, the employee pulls down the boy's diaper, and then sets him up on the potty. Now shrouded completely in darkness, with only the knowledge of there being a young boy about to pee above her, the girl pulls her diaper open so that anything will fall in.
The boy then starts to let it loose right in her face, coating her in pee while filling her diaper full of poop. During this time, the employee is called out for a meeting, leaving the two alone...