@no168_92 as of chapter 280 they dont have kid and it's not sure as if they actually had sex, but their relationship progress with time so we will probably see MC with a few kid before this story end (and when i say a few kid i mean a lot of kid).
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later when they visit Layla's village efi announce she is pregnant and that also the time he takes layla as a wife but that's in 250+ of the novel or maybe 300 not sure.
Sounds like the prince is going to cause trouble in the near future (for himself, seeing as even with the country's entire might behind him, he'd still be at an overwhelming disadvantage). Of course, that assumes he remains in power long enough to do anything.