@Yuka It’s a small spoiler though
Spoiler!
So all of her 3 kids are illegitimate (as we know from current chapters). The first queen discovered the affair and sent a letter to her husband to forgive the second queen and accept lysander (current king). When they uncovered the body of the king under the golem, he was writing a reply saying he will accept the child.
I like to post spoilers for the stories I find interesting because I don't have much time to read novel due to busy schedule
you will find me in most romantic historical manhwa comment sections 
you will find me in most romantic historical manhwa comment sections 