The Lion’s Hurricane by Caitlin Ricci

Jason has a type: dangerous, unavailable, and guaranteed to break his heart. So when Robin’s terrifyingly hot older brother rolls into the bar on a bike that makes him drool, he knows he should stay far, far away.
Ash doesn’t do relationships. Five years of classified ops taught him that attachments are liabilities, and his parents’ disaster of a marriage taught him the rest. He’s not built for soft things.

But Jason keeps feeding him. Keeps looking at him like he’s worth something. Keeps making Ash want things he swore he’d never let himself have.
One of them is going to have to break first. Ash is starting to hope it’s him.