
Eh I'm not sure but from the info: He didn't want to leave the kids in that vixens hands but because of the contract of life. he had, he sent one of the prince's to keep an eye on them but because the haven't seen the kids leave the house and there hasn't been any recent payments he assumed they were dead..
Tbh I think that mother abused her kids cus they stole all her powers or smth so now she doesn't have control over the king which is totally disgusting

So basically: he "abandoned" them cuz of a death contract...
By how he said "yes, they are my children(more or less)" I thought he just left the twins with her cuz he wasn't accepting them
Btw if one of the prince was "watching" them, couldn't he at least I dunno enter that palace? ....or maybe they couldn't enter at all as part of the contract??(am i thinking too deep? XD)
Can I ask if the emperor is gonna give a reason as to why he just left the twins with that bitch not even caring about them? Or is that the end of it?? (I must seem like a broken disk but I really need an answer ಥ‿ಥ