Say Yes to the Death - Susan McBride

Someone old, someone cruel Debutante dropout Andrea Kendricks is beyond done with big hair, big gowns, and big egos—so being dragged to a high-society Texas wedding by her socialite mama, Cissy, gives her a bad case of déjà vu. As does running into her old prep-school bully, Olivia La Belle, the wedding planner, who's graduated to berating people for a living on her reality TV show. But for all the times Andy wished her dead, nobody deserves Olivia's fate: lying in a pool of blood, a cake knife in her throat—but did the angry baker do it?
Millicent Draper, the grandmotherly owner of Millie's Cakes, swears she's innocent, and Andy believes her. Unfortunately, the cops don't. Though Andy's fiancé, lawyer Brian Malone, is handling Millie's case, she's determined to spring Millie herself. But where to start? "La Belle from Hell" had enemies galore. Good thing Andy has a BFF who's a reporter— and a blue-blood mother who likes to pull strings.