Killer Instincts by Tawna Fenske

He’s a hired gun. A hardened killer. So how’d he end up bottle-feeding lambs for his best friend’s sister?
Dante didn’t set out to deceive. His favor for a pal in prison got him this farmhand job, and Jen needs help guarding more than her blueberries. Someone’s set on hurting her, and he’ll make damn sure they don’t. She can’t know who sent him or why he’s handier with a handgun than a hoe. But none of that matters more than keeping Jen safe.

To save the girl, he’ll have to pair old skills with new. A princess tea party and an old-fashioned gunfight? Why not. Grape stomping and grenades? Sign him up. But as the enemy closes in, there’s one skill Dante finds he doesn’t have: The strength to walk away when the job is done.