It's late at night in a Child Servers facility. The teens are strapped down and forced to sleep in cribs, soft lullabies play in the infant holding area, and only a few caretakers are out and about watching the remaining children.
Most little ones sleep on or around the playground equipment set up in the main holding area, snuggled up to each other under the slide or sprawled out in the sandbox. A couple small children still toddle around and play quietly.
One of these awake children is a 3-year-old bunny girl with light blue fur named Belle. The small girl plays with some blocks, trying and failing to stack more than 3 without knocking them over. The little one isn't even potty trained yet, wearing a diaper under her Child Servers onesie.
The window into the security area is empty of anyone watching this time of night, and there's little supervision. A fox named Samantha with large breasts overlooks the area from a watchpoint set up on the other side of the large, pastel wall, and beneath her a tiger lady scrolls on her phone vacantly, not watching at all.
Belle gets bored of her blocks after failing to put a tower together for the 10th time, and so she waddles over to just beneath the fox's lookout and asks her sheepishly, "Can you... you read me story?" After a moment, she adds, "Please?"
Never one to give up an opportunity to have a child on her lap pressing up against her crotch, Samantha obliges, "Sure thing, sweetie; I'll be right there~" She climbs down from the vantagepoint and asks the tiger to keep watch. The tiger doesn't even shrug to acknowledge her.
The gate opens just slightly, and the caretaker enters, closing and locking it behind her. "Now then, lets go pick out a book to read," the caretaker guides Belle to the reading room. Belle picks her favorite story about a dragon and the 5 little cubs that feed it.
"And where would you like to read it at, sweetheart?" the caretaker asks.
Belle points to a secluded edge of the main holding area and tugs Samantha along by the hand. The caretaker goes along with her eagerly. They sit down together, and the caretaker pulls Belle nice and close onto her lap.
With one hand on the book and one hand gently exploring Belle's body, Samantha reads to the little girl for several minutes. Eventually, though, Belle gets hungry.
GRRWWWL
Samantha ignores the noises of Belle's stomach, not wanting to get up to feed her with her so nice and close on her lap. Belle takes her own initiative.
OMPHF-
As Samantha moves her hand to turn another page, Belle leans forward and slips a couple fingers into her tiny mouth. They fill it up entirely with how small the little girl is. 
"Oh dear, if you're that hungry, you should've said something. Do you want to go get something to eat, sweetheart?"
ULP SLRK
Belle ignores the caretaker entirely and slips the entire hand into her maw, gulping some of it into her throat already.
"H-Hey, stop that," Samantha tries to pull her hand out of the little bunny's warm, soft maw, but she'd severely underestimated the child's throat muscles.
GULP ULP
With a couple more gulps, Samantha's entire arm is pulled into the child's maw.
"Now look, you can't swallow me any further than that. Let's go and get you some real food," the caretaker bargains, her pride preventing her from calling for help. Belle does not relent, however, and her already incredibly stretched-out maw widens further to engulf her head and shoulder.
ULP SLRP GULP
Samantha begins to struggle much more violently, but by now Belle already has the better of her. Her remaining arm goes into the little one's mouth, and soon her enormous breasts are forced in after it.
GULP ULP SLRK GRRRRRGGLLE
The little girl pulls the rest of the caretaker into her body and lies down on her back. The comparatively enormous form of the fox forced into a fetal position in her gut as it balloons out over her. Samantha's breasts and curves are well-defined in the impossibly-tight bulges, so tight that even the slightest attempt to move proves impossible.
Belle lets out a tiny "Urp" and promptly falls asleep, drooling onto the padded floor as Samantha starts to melt inside of her. The little girl is barely cognizant of what she's done beyond filling her belly with a warm meal.
GROOOOANN GLORRRP GUURRRRRGGGLLLL
Over the course of the night, the enormous bulge of Belle's belly loses shape and softens into an amorphous bubble of mush and bones. Samantha's muffled pleas for help die down as the fox herself does. The caretaker's remains make their way through the guts of the little girl slowly.
Come morning time, blame will be cast around, but ultimately none of the other caretakers will be blamed for the incident. Even the tiger who should've been keeping watch had naturally assumed Samantha had disappeared to indulge herself in the little girl, and none of the others could truthfully blame her. By the end of the day, Samantha's digestion will be written off has a mere error on her part, and the staff and great child devouring machine will move on.