Forgot the name of a webtoon

I don't remember the details of the webtoon but i believe it was a romance fantasy, and one of the main characters had a mom who was in a love triangle with the king and their father. The mom obviously ended up with the dad but the king was jealous of their relationship, pretended the mom died then imprisoned her. The dad ended up working under the king and did a lot of bad things for him i think. I don't remember which main character's parents these were tho......

If anyone could help that'd be great! Thanks in advance!