Small Town Affairs   When he started dating his brother’s wife, everything went to hell. I guess dating isn’t really the right word. He was having an affair with her, and they weren’t careful enough to conceal their love.   They rubbed against each other at family barbecues and kissed each other goodbye a little too long after church. They met   “accidentally” at the mall for long lingering lunches at IHOP. When the romance was finally revealed, everybody in town was surprised. Ladies whispered in beauty salons, and pickups idled   in the middle of Ash Street, driver’s door…