Deep water - Patricia Highsmith

Melinda Van Allen is beautiful, rebellious, tempestuous and sexy. And unfortunately for wealthy socialite Vic Van Allen, she is his wife. An incorrigible flirt, Melinda spares no opportunity to flaunt her many lovers to her husband. In response, Vic doesn't miss an opportunity to let them know that he's the jealous type. When Malcolm McCrae, one of Melinda's exes, is murdered in the city, Vic doesn't hesitate to suggest to her latest paramour that he might have been responsible. But as rumours about Vic's nasty streak begin to spread amongst their friends, fiction and reality begin to converge. And it's only a matter of time before Vic really does have blood on his hands.