Lion's Share

Blythe Marston was widowed at 28, nine years and four children after she and her high school sweetheart had married. She'd had the perfect life: husband, marriage, kids, house, in-laws, parents, friends, health. Until the cops showed up and told her a drunk driver had taken it all away from her.
As the condolences drifted away and she started putting herself back together, only one man stayed with her to guide her to her independence: Phineas Marston, her father-in-law. Six years after her husband's death, she's still raising her kids, gotten an education and the most unlikely career, and learned how to be happy again.
But not alone. Never alone. There has never been anything between Blythe and Finn, no spark, no desire, no thought of anything. Her dead husband binds them and Finn grieved along with her. There has never been anything more than that between them-
-except kid drama, school events, family dinners, conversations, opinions, arguments, celebrations, work time, chores, advice, and the dozens and dozens of cookies she bakes for him to take to his office on the holidays.
There's nothing between them.
Nothing at all.