Husband and his porn problem!

Would you be worried? About a year ago I found tons of porn on my husbands computer, almost all of it was "incest" porn. I have never been the controlling type but I told him I didn't want him watching that because it's gross. He said he loved me and would stop. A few months later I find some more I also find a bunch of sex sites and dating sites. He hadn't used the sites since we had been together just hadn't deleted them. He had even paid for some sex sites. He also was looking up pictures of girls he knows naked on some ex revenge site. I talked to him because I think he has a serious sex problem, like addicted to porn or something. He said sorry again and said he would stop. We have only been married a few months but I look after everything he does, I don't trust him anymore. Would you?