Stone by Anna Hackett

He’s the new silver fox recruit at Sentinel Security.
The hot, tough former Marine Raider.
And he won’t touch her because he works with her brother.
Real estate agent Magnolia “Nola” Newhouse has it all. Okay, not quite all. She loves her work, has a growing collection of designer heels, and is about to become an aunt…she’s just missing the love of her life. She’s watched her brother and her best friend fall in love, and Nola wants that too.
When she first sees the big, rugged silver fox across the bar, she feels an instant connection, and knows he does too. They share a passionate kiss, then he discovers who her brother is…
Former Marine Knox “Stone” Holman needed a change. He’s left California and taken a job at New York’s top security firm: Sentinel Security. What he never expected was to lay eyes on a tiny, curvy woman and feel his world tip upside down. But Knox lives by a code, which means his co-worker’s beautiful sister is off-limits. Besides, Nola has love, marriage, and kids stamped all over her, and he’s past that.
But when Nola goes to inspect an empty penthouse and accidentally witnesses an execution-style murder, everything changes. She’s on the run and being hunted by the mob, and Knox will do everything to keep her safe.
Running the gauntlet of the New York streets, Knox and Nola will discover just how hot their attraction runs. Knox is determined to protect her, and Nola is determined to make him hers.