Spoiler
The last 25% of the main story has her pregnant with twins. Main story ends with her about to give birth in about a week or so since her MIL was about to arrive in Calztela. Side story has their kids as babies then as 3 year olds who talk well. lol Then side story ends with Ines about to give birth to their third child who is exactly like Carcel in every way. Even his easygoing personality.
as the person above said its going to take quite a while TT but heres an image of them from the novel! https://www.novelupdatesforum.com/threads/this-marriage-is-bound-to-fail-anyway-%EC%9D%B4-%EA%B2%B0%ED%98%BC%EC%9D%80-%EC%96%B4%EC%B0%A8%ED%94%BC-%EB%A7%9D%ED%95%98%EA%B2%8C-%EB%90%98%EC%96%B4%EC%9E%88%EB%8B%A4-this-marriage-is-bound-to-sink.126106/page-114#post-7197394
did they have a child yet in the novel?