In my own situation, a very much respected man from the church confessed to me that he had been cheating on his wife to fulfil some bordering on violent sexual urges. He told me that he thought he was demonised and he was a danger to women.
I was terrified (I had been raped 7 years before) I didn't know what to think or what to do. I told him that I was sorry but I couldn't help him but I would pray for him and suggested that he should talk to the Pastor. I then avoided him as much as I could but he 'cornered' me in the sunday school so I asked him if he had spoken to the Pastor, he said he hadn't.
I prayed and prayed about this and looked to the bible and thought that I should go to the elder of the church (the fact that he told me that he was a danger to women was playing on my mind).
I spoke to the elder about it, I didn't want to go to his wife (I was very cose to her at the time but because of the nature of the situation I didn't want her involved).
The next thing I know we were being accused of having secrets, then we were accused of having a affair!!!!!!
I hope that things get better for you podmog, I know I haven't helped but its one of those things that does bother me from time to time.