The Trust We Hold by T.K. Chapin

How do you learn to trust?

Officer Nathan Rodgers is a man who has seen the best and worst sides of humanity. Serving the Spokane Police Department in Eastern Washington, he lives to protect the innocent. After his wife abandoned him and his daughter, he stopped believing he could trust anyone.
To trust we must give and to give we must first have.
Tiffany Carlson only ever wanted what was best for her son Eli. She trusted his father with her whole heart, her whole existence, and then he destroyed her. How could she ever trust again?