Funny As a Dead Relative: A Kimmy Kruse Mystery - Tapa dura

As the story opens, comic Kimmey Kruse is summoned from a Pittsburgh gig by Me-Maw, her grandmother, because Paw-Paw, her grandfather, has broken his leg. Since Me-Maw banished him from her house years before ("You can't keep a house clean with a man in it, yeah.") and Kimmey's mother has gone off to the Antarctic with her professor husband, it is up to the comic to baby-sit the feisty old man.
The picnic/family reunion that Me-Maw takes her granddaughter to turns out to have several memorable elements. There's the food, of considerable interest to ninety-pound Kimmey; there's her gorgeous cousin Willard, whom she's never known because Willard's mother, Letitia, and the female relatives have been feuding for ages; and then there's the death of Letitia, in her car, from a barrage of wasp stings.
Two dead wasps in a jar in the dead woman's car convince Kimmey that Letitia was murdered; of course, no one believes her. Until the sexy and infuriating Chicago cop Kimmey met during her first murder case shows up uninvited to exasperate Kimmey and inflame her with desire. Eventually, she is proved right, but what's the good of that if the proof is being pursued by a killer at midnight along the top of a slippery sea wall?