It is rude to favor one twin over the other.
Molly's twin sons, Mason and Jason, are turning 16 soon.
Molly wants Jason to have a good birthday.
Molly surprises each son with their own car as birthday gifts.
Molly buys Jason a car for his birthday, but doesn't get one for Mason.
The boys enjoy their new cars and feel that they've been treated fairly.
Mason feels unloved and runs away from home.