Let It Be Me - Men of the Misfit Inn, #1

Four years ago, firefighter Caleb Romero saved a child and met the woman of his dreams. But trauma killed the timing, so he's contented himself with being the friend she needed as she navigated sudden parenthood. Four years ago, Emerson Aldridge became a mom in the worst possible way. Without qualm, she abandoned her own dreams to shepherd her teenage daughter through their shared grief. Her number one priority has been to raise Fiona the way her best friend would have wanted. Now Fi's headed off to college and Emerson has no idea how to feel about her suddenly empty nest.
She barely even remembers life before motherhood, but Caleb's right next door to give her a reminder-along with a toe-curling kiss that catapults them past friends and into something more. The life she wanted before the accident is still within reach. He just has to convince her that their age difference means nothing. Piece of cake. Right?