So one partner in the marriage decides to make themself happy at the expense of hurting someone else? The person the vowed to love? Did you read what was making her unhappy? A lack of attention. If she felt neglected why not tell her husband? Why run to another person? The husband should forgive if he wants but the wife's need for attention is the problem. If the guy is busy, why can't she understand? Do people that love each other need to be joined at the hip all the time? If you need that are you really in a secure relationship? This woman actually has emotional problems and needs counselling.