Diamonds (and Girlfriends) Need a Keeper — Sandra Sookoo

Special Agent Mitchell is feeling the pressure now that his best friend and fellow agent is engaged. He's been dating Sam for almost a year but has yet to pop that all-important question and there's disappointment in her eyes when he remains mum on the subject.
Samantha Arnold is a woman on a mission. If her man won't take that next step, then she'll just ask him to marry her. Except, things aren't that simple. Somewhere between the euphoria from having a literary agent request her book and picking out a ring for Mitchell, Sam finds herself in the middle of a hostage situation. Of all the rotten luck.
Finding time alone to discuss their future isn't meant to be as the Arnold family constantly interrupts. Emotions boil over with a bang at the local shooting range, proving once again their lives will never be the same again.