The O’Rourke Brotherhood Series by Sabine Barclay, Celeste Barclay

You can’t hide anything from me. She thought she knew me. She thought I wouldn’t find out. I did. Now I’ll protect her from herself and anyone who thinks to touch what’s mine. The pleasure I’ll bring her is unlike anything she’s ever known. The damage I’ll do to anyone who gets in our way is unlike anything you’ve ever known. She’s mine to have and to hold. And that’s exactly what I plan to do. She’s my cailín, and I’ll be whoever she needs.

You’re a fool to underestimate me. I do more than just run numbers. I do more than just work for my family. There’s nothing I won’t do for her. Touch what’s mine, and you won’t live to regret it. She’s more than I knew I wanted and everything I need. She’s light where I’m darkness. She’s kind where I’m ruthless. My pleasure comes from her pleasure, and I’ll give her more than she imagined. There’s no one and nothing more important than her.