Butch by Kylie Hillman

To save his Club, he has to sell out his soul mate.
Brian “Butch” Kelly became the father of a toddler overnight. His ex-girlfriend left their child on his doorstep with nothing but a note and a bag of clothes before she split for parts unknown.
With his Club on the cusp of a turf war over their ongoing expansion plans, he doesn’t have time to raise a kid.
Thankfully, his little sister’s new friend offers to help. Only problem? She’s the secret daughter of their greatest enemy and she’s just stumbled onto enough ammunition to bring the Black Shamrocks MC to its knees.