My wife is having an affair. What should I do?

she probably does love u, but sometimes the chemical reaction one gets from an affair is just too much for someone to avoid, they like how it feels, the excitement of it. it is a character flaw, but only u can decide what your going to do, sometimes when a woman is immature she will do this, she feels flattered by the attention the other man gives her, but it doesn't help the man she is married to.