I looked at the first few chapters, and here are my notes: I seems like English might not be your first language? So that issue would need to be addressed, because it can be distracting, sometimes. It's a clever idea, a nice hook for a book! You need to show in dialogue some of the parts you explain in prose; instead of putting in an "info dump" the whole section where you explain the background of how they wound up where they are, you probably need a flashback chapter with dialogue and everything. It's more powerful than just explanation, you know? Like have the woman tell the young man she's leaving him and marrying the father, and tell how he feels in that moment?
I hope these notes help a little, and best of luck to you!