This leads to a fictionalization of her parents' downsizing and spending their remaining years in a small town in British Columbia....and also the pitched battle she appears to have had with her brother over heirlooms. What's pure fantasy is the time afterwards because Lynn appears to have not gotten the answers she wanted from her parents: "Why didn't you love me, Mommy? Why did you always make me feel bad? Why didn't you let me give up on myself?" and "Why didn't you punch Mommy in the head and MAKE her love me, Daddy?"
The end result of this is not just the treacly exitus Marian made but a wish-fulfillment future with Jim that led him to having Lynn's idea of a wife for her father: a woman who whipsawed between being a doormat and his mommy. I don't know if she's giving her dad a happy ending or punishing him for not flat-out decking his wife and making her indulge her idiot child's whims.