As far back as he could remember, Sam had been fighting for a woman he'd never known. It was different for his dad and brother; they had memories of Mary Winchester. Sam had a couple photos, a chilling story of her death, memories his brother would sometimes tell him, and the memories his father had when he was drunk enough to tell them.
He understood his father wanted revenge—but how would the love of his life feel about him dragging their two sons around the country, killing things?
Sam never really understood how his father felt until Jess's death.
Okay, I promise you I'm done with specific people until the very last chapter. Promise.