All's Well That Ends - An Amanda Pepper Mystery, #14

Amanda's friend Sasha's stepmother has just committed suicide-although, according to Sasha, Phoebe Ennis would never have killed herself, especially not while having a drink and wearing a red silk blouse and red sandals with four-inch heels. Amanda isn't persuaded, but reluctantly agrees to help investigate the woman's demise, though the evidence for foul play is slim. True, the middle-aged compulsive collector of knickknacks wasn't universally loved.
Phoebe's own son hated her, and she bored her friends to death with hints of her "royal" lineage. And with four marriages behind her, she was already preparing to announce her renewed availability on the Net. But when another woman is found dead in Phoebe's house, it becomes clear that something is indeed murderously amiss, and much closer to home than Amanda or anyone else could have imagined.