When You Were Mine by Mila Nicks

When bad boy Dylan Turner walked out of Penelope Spark’s life six years ago, she was convinced she’d never see him again. Now a single mom to her daughter, Tabitha, and the owner of a small candle shop, Penelope looks forward to a stable life without heartbreak.
That was before Dylan Turner showed up in Oak Bend like a relic from the past. Even worse? He’s rented the apartment next-door. A few years older and more mature but still with a bad boy edge, Dylan is a firefighter just trying to figure out what he wants in life. Could that be his first love, Penelope?
But there is one minor problem. Penelope has a secret that’s six years in the making. One that might destroy their relationship for good. If they’re meant to be together, they’ll need to come to terms with the past and learn to trust each other again. Can they overcome past heartbreak for a second chance at forever?