Slow Burn by Jessica Prince

When she started on the path to her new life, she never could have guessed where it would lead her.
Deva Kent spent most of her life dreaming of escaping. She hated being forced to live among the Fellowship of the Enlightened, the small community closed off from the rest of the world, and was desperate to spread her wings and discover something new. When she applied to be a nanny for a single father and his two-year-old son, the Fellowship wasn’t happy, but she knew that was her fresh start. However, she never thought she’d end up falling for the man with more baggage than he could carry and storm clouds in his eyes.
Laeth Harker’s world fell off its axis the morning a past one-night-stand showed up on his doorstep with a son he knew nothing about in tow. He barely had his own life together and didn’t know the first thing about caring for a child. But after spending most of his life screwing everything up, he was determined to do right by his own flesh and blood. He just didn’t know where to start.
When Laeth hired Deva on as his son’s nanny, she was supposed to make his life easier. But the way he felt about her was the very definition of complicated.