In talking with readers, I've had a question posed to me more than once – why did Tracy seduce Chuck? If she just wanted a baby, why not take care of that on her own, using an anonymous donor and an artificial insemination procedure? Good question. I have two reasons.
There would be no book!
That's the simplest reason. If Tracy doesn't go after Chuck, I have no story. Of course, that presents its own interesting set of what-ifs, too. Where might the Molinsky marriage have been in ten or twenty years had they not been forced to fix the deep issues between them? Would they have stayed together once Brad and Joel left home? What would have happened when retirement came and they found themselves staring at each other across the breakfast table?
There is a plot/character reason, too.
Tracy needs control.
Yes, she wanted a baby, but she wanted to choose and engineer the situation as much as she possibly could. Chuck fit her profile perfectly, and his being married was a key part of that. The last thing Tracy wanted was a relationship. In her mind, the terrifying reality was that someone you loved and trusted could completely snap. She would never risk her baby being hurt that way so there would never be a connection with the baby's father.
She carries deep soul damage from witnessing her mother's murder that drives everything she does. She operates from behind a carefully constructed, tirelessly maintained, yet very fragile persona. Without Jack, I can't imagine she could have lasted very long before she self-destructed. She was well on that path even with Jack.
Comments? Other questions?