"The New York Times bestselling author of The Best of Enemies serves up a hilarious new novel of the "sandwich generation." Actuary Penny Sinclair has a head for business, and she always makes rational decisions. Knowing that 60% of spouses cheat and 50% of marriages end in divorce, she wasn't too surprised when her husband had an affair. (That he did so with a woman their daughter's age? Well, that part did sting a bit.) She just made sure she got...