Michael: The Hawthornes by Nicole Jacquelyn

Michael Hawthorne has known what he wanted from life since he was fourteen years old.
A Harley, to join the Aces Motorcycle Club, and to marry Emilia Robertson.
When he turned eighteen, those three things seemed within his grasp… until Emilia and her parents disappeared without a word.
Three years later, Emilia appears on Michael’s doorstep—older, beautiful, and mother to a toddler who looks just like Michael.
He doesn’t know if he can trust her.
She doesn’t know if she can count on him.
He’s still in love with her.
She never stopped loving him.
Everything Michael’s ever wanted is within his grasp again, but in order to get it he’ll have to find a way to forgive the girl who broke him.