The Lost Weekend — Frankie Bow

Mary-Alice Arceneaux has started a new career at age 70 as the newest member of the Sinful Ladies' Detective Agency. She is happily learning the principles of detection from Ida Belle, Gertie, and Fortune--and of course, picking up tips from her beloved mystery novels. But Mary-Alice finds herself on the wrong side of the interrogation table when her cousin Celia accuses her of a shocking crime. 

Unfortunately, Celia's story looks plausible--at least to a sheriff under intense pressure to make a quick arrest. Now Mary-Alice and the Sinful Ladies have to find out what Celia's hiding, and find it fast...or Mary-Alice will pay with her freedom.