Romantic euspense is the best description of A Bodyguard to Remember. There romance, suspense, spies, children in danger, a heroine feeling like she's in the middle of a "Perils of Pauline" movie* and is trying to hold onto her sanity... so some humour too. All great ingredients of a Romantic Suspense.
Because of research I did for an earlier detective series (Deadly Legacy and Deadly Season), there is also an element of police procedural -- seen from the point of view of the victim of the crime. I won't say I didn't take a few liberties, especially when it came to national security, but even if they (CSIS and the RCMP) shared information with me, I would have had to fudge it.
In the end though, it's a romantic suspense.
*I have never seen "The Perils of Pauline." I'm not THAT old. If you don't know the reference, Pauline would get into dire straights in her serialized movies. She'd be rescued by a hero, only to be left hanging from a cliff at the end of the episode so viewers would have to return to find out what happened. "Perils of Pauline" was one of, if not the first source of the term "cliff-hanger".