Ok so here is the spoiler.
As you know from the comments below.
ML and FL slept together and FL ran away on their wedding day.
FL ran to the capital where the royal family realized that she was their missing princess,i think because of the tattoo on her back or a birthmark.
The reason why she went missing as a kid ,maybe 5yr, is because ML ,this pervert, saw her when she was walking in the palace garden ,fell in love at first sight,pervert, and kidnapped her,pervert.
Later on he found out that she was with her family so he gather up his army amd prepared to start a war to get her back.
War would of have happened if she didn't decided to go back to him.
At this point i am wondering if FL has Stockholm Syndrome. And Iam grossed out by the fact that ML basically groomed her to be his wife after he kidnapped her
Oh and FL family is super nice, i think her brother is a siscon and the royal family has been looking for her for years.
and i am kinda disappointed. Ml is a lolita scum.if anyone wants to know why then tell me and I'll spoil it