Nightshade on Elm Street : a flower shop mystery

"In addition to running her flower shop, planning her wedding, and juggling two mothers who both want to host an elaborate bridal shower, Abby Knight is facing another complication. Her ditzy cousin Jillian asks her and her longtime beau, Marco, a private detective, to find a woman who's gone missing from the exclusive beach house belonging to Jillian's in-laws, the Osbornes. The missing woman is also the fiancée of Pryce Osborne, a wet noodle with a big bank account who dumped Abby just before their wedding several years ago. Merely being anywhere near Pryce makes Abby's insecurities grow like kudzu. Then a woman's drowned body surfaces, and Pryce becomes a prime suspect in her death. Unless Abby and Marco can get a killer to come clean, their bridal shower will turn into a complete washout-- and Pryce will be exchanging a sunny beach for a prison cell" -- from publisher's web site.