If we kiss

This is a very nice and good book i really enjoyed it. The novel is of a teenage girl that had never kissed a boy before, and suddenly she had her first kiss with her bestfriend's boyfriend. So her bestfriend broke up with her boyfriend but then she realizes that she actually likes someone else that have liked her for so long, and her mom and the guy she spent her first kiss with, dad got married and now they are treating each other as siblings :)

it is a complicated book but very enjoyable.

I don't understand why soo min ready this book and said that the mom and kevin's (the guy she spent her first kiss with) dad broke up because they didn't?