I have recently started reading a new book. It is called The Pact.

There are these two neighbor families that live by each other. Both the mothers are pregnant.
They have the children. Ones a boy ones a girl. They always joke about them getting married. However, the children fall in love with each other.

One night the go out just like usual. None of the parents really questioned them or worried about them. Then all of a sudden both of the familys get a phone call. The police say that their children are at the hospital. They go to the hospital and found out that the girl, Emily, has passed away due to a gun shot to her head.