Cheating Husband

[Mike106]

So, I never doubted my husband's fidelity until one day when I called to say I was on my way home from work, and after we hung up, his phone called me back without his knowledge. I heard porn playing and what sounded like other people having sex in the background. I listened for 35 minutes and then got too mad hung up and called. He denied he was doing anything until I said I had heard everything but only admitted to watching porn so I told him to leave the porn tape (online) up and the dialogue better match what I heard. Well it didn't match, he had been freshly showered, and then told me he was getting ready for me. We've never had set after I come home from work (14 hour days) but maybe 1 or 2 times in 10 years. He claims he was alone. I don't believe him. There are other things that lead me to think he is cheating. Long periods of no sex, no anal intercourse which used to be a pretty common thing. All of the porn he was watching was anal intercourse porn. And the part of the dialogue that didn't match was verbal of another guy yelling give it to me repeatedly and moaning in between. Am I crazy to be concerned? I've been spying on him and have seen suspicious activity but haven't been able to catch him in the act. Also have voice tapes of what sounds lie him and someone having sex. He says he isn't cheating and never has. I don't believe him. We are travelling together alone and there isn't a lack of sex on the trip which makes me think he's cheating at home even more so.