In mainstream women's fiction, there may be less emphasis on the romance and more on the suspense. In a romantic suspense, those key factors must be balanced or weighted in favor of the romance. Given that basic requirement, romantic suspense is a highly diverse and dynamic sub-genre. Over and above these basic requirements, there are certain key characteristics that set romantic suspense novels slightly apart from the other forms of romances. First and foremost is action.
Startling events occur, keeping the characters and readers on edge.
Faster Pacing With increased action, the story moves rapidly. There's less introspection, more dialogue. You may be wallowing around in the characters' heads too much. If so, introduce some event of interchange that gets the players back on stage and interacting with each other. High Levels of Tension Key to romantic suspense are elements of danger, or jeopardy.