Tomorrow, and Tomorrow, and Tomorrow

I always include major spoilers (hidden), to help with my memory  issues. Read them at your peril! 

I don't have a good explanation, I was just really bored from quite early on. These notes are for my own use.

Sadie, girl  visiting her sick sister in hospital, meets badly injured boy, Sam,  gaming on his own. She is the first person he has opened up to since His mother was killed in the car crash that almost destroyed his foot. They don't meet again until they are both students at MIT because she was claiming the hours with him as credits towards her bat mitzvah, and he feels betrayed. Eventually, they create a game together which is about a 3 year old who gets swept away to sea and takes 7 years to get home again. They use a gaming engine written by Dov ,the married ex professor and on/off lover of Sadie. They are also helped by Sam's kind college room mate Marx who will go on to father Sadie's child and die in tragic circumstances that I didn't get to, just flipped forward to see what happened