Not very immersive or believable (I don't expect realism but believability is different), and I didn't care much for the characters. I think the beginning feels pretty rushed, so I didn't have time to get attached to the characters. I really wanted to like this, but the writing style didn't click with me. 

Also, this is just a personal opinion but I find it very weird and uncomfortable that

a set of sisters are married to a set of brothers and have children with them. Sister-cousins? Gives me the creeps lol. I know people do that in real life, but it's definitely not something I want to read about, especially in a book for a younger audience.