[That or they accidentally created their "MK" via Pinocchio-esque ai/robot on accident and now they're freaking out about it.]
Hmm...maybe MK is made via egg BUT their Bai He (or equivalent, maybe mixed with other parts of the other kids, cus I doubt Fabledconnection is gonna go as big as Shadowpeach in the family department) is an AI similar to Sophia from Persona 5 Strikers?
I can imagine the Fabledconnection duo either made her on accident, or they straight up adopted a lesser known "artifical human" fairytale entity that translated into an AI in the Library World.
Theres Chinese accounts of artifical humans all the way back to 400 BCE - in a Liezi text, an artificer named Yan Shi shows off his creation to the King (King Mu of Zhou), which is so lifelike that the King tears the automation apart right then and there.
Another potiential AI child is Olimpia from Der Sandmann (1817), a "perfect girl" clockwork automata created by an alchemist who has a similarly tragic end.
Fableconnection finds a wee AI child with a terrible ending? Their child now. Smash!LEM hacks the Library database to make it so.
Smash!SWK, hears front door open: "Hey love- whoa! Whats that?!" Smash!LEM, holding the AI child like a laptop: "...a robot kid I stole from the Library archives." Smash!SWK: "...alright then."
The other monkeys at the next Wukongverse meeting have a lot to ask about.