I think she "got pregnant" because she was storing magic she absorbed from other people, than "gave birth" when her body couldn't handle absorbing anymore magic.
The prince created an magic puppet from his own magic (I think) in a moment where someone he cared about was somewhat in danger so he kind of "vomited" magic to create a creature who would protect her, which is why he got soo weak after. We need to remember he IS sick and is mostly alive because of magic inside of him and healing magic.
But yeah. Where the hack is the panda? I also want to know. The author seems to have forgotten the magic puppets are supposed to be important. I mean... the king killed a serpent and the knight DIED. So... what the hack?
Okay I have so many questions
Why The heck did her belly go pregnant mode, gave birth to a panda, what the fuck happened to her little pet thingy and when the prince released his pet why didn’t he go pregnant mode....
Also at this point only gonna read this for the memes XD.