Roses Are Red; He's Dead
by Janet McNulty
Book 9 in the Mellow Summers Summers Series.
Mel and Greg are on a romantic getaway when murder falls into their laps.
While spending time at an exclusive resort, Mel discovers a body, except when she tries to tell someone, it disappears. Soon the same body appears wherever she goes, and the other tourists, including Greg, believe that she has imagined the entire affair.