Second Place in His Heart by Kristy Lowe

He came home to me every night. But I was never the destination. I was just the place he rested his legs.

Nora Callahan believes in safety. As a trauma nurse in a busy Boston ER, she spends her life stitching people back together. When she meets Declan Murphy, a firefighter with a crooked smile and a hero’s reputation, she thinks she’s finally found someone who can hold her together, too.
They build a life in a brick rowhouse in Southie. They paint the kitchen blue. They plan a garden. They talk about a baby. From the outside, they are the perfect couple: the nurse and the firefighter, solid and unbreakable.
But the foundation is rotting.

It starts with small things. A phone placed face-down on the table. A gaze that drifts to the window in the middle of a conversation. A feeling that Declan is merely performing the role of a husband rather than living it.
When a devastating betrayal comes to light, Nora is forced to confront a truth far more painful than a simple affair. Declan didn’t cheat because he stopped loving her. He cheated because he wanted to be light, and Nora—with her mortgage, her expectations, and her deep, grounding love—was the weight holding him down.

In this heartbreaking domestic suspense novel about the quiet violence of settling, one woman must decide if she is willing to be the anchor for a man who only wants to float away—or if she is brave enough to cut the rope.