Return of the Female Knight

well,was it a happy ending?I mean,did male and female all survived and lived happily ever after?I'm a little worried about the prophecy that crown prince mentioned that the crown prince's first wife's life will be vary miserable. so can you please tell me. 

how many children do they have? 

Thanks for the spoiler.

Confused though, so she knew ML from the first timeline? Did he not die? Or they knew each other before their death? And he has those memories?

Or did ML survive what was supposed to be his death in the first timeline and then they get acquianted? Then he has memory from the first timeline? 

can someone pls explain why the father doesnt care abt the eldest daughter??  i dont get it