My husband started sleeping with his affair partner every other week. It happened about 6 times, starting when our infant son was 2 months old. After that initial 6 times, he would have sex with her once a month to every other month for 5 years. This includes a day trip to a museum, 4th of July, 2 days in Vegas, 5 business trips, happy hour restaurants, coffee, etc. He claims that the majority of the time it was at her apartment and he claims that it was not often. I beg to differ as once a month to every other month for 5 years is about 60 times that he had sex with her which to me is very often. We have been married for 11 years and I told him that he had been with her for half of our marriage to which he states that he rarely saw her and he calculated it based on hours spent with her at 1% of his waking hours. He thinks that I am exaggerating and making the affair out to be more than it was; basically, a sex buddy. I disagree on both accounts. He was with her for 5 years so half of our marriage and he is minimizing the affair. What do you think and how do we come to closure on this?