Georgia Bottoms by Mark Childress

I've never read anything by this author, but I definitely have to get his other books now. (He also wrote Crazy in Alabama, which could also serve as a good description of this plot, too.) The title character's family name was Butts until her grandmother changed it to Bottoms because it sounded nicer. They live in a tiny southern Alabama town that only has a half-size Belk's. To say her life is "interesting" wouldn't do it justice by half. Georgia has a regular "date" with different prominent (and married) men each night of the week. Except for Mondays which are just for her. She does all of these in strict secrecy from most of the town all while appearing, to most people anyway, to be an upper class modern Southern belle. The book covers her mid to late 30s and what happens when all the secrets come undone. I highly recommend it!