who are you?

[MrBond]

"i did ask him why and he told me to just leave him alone."

Is this after it happened the first time or others as well? Was the approach - "honey, I have a problem with you looking at porn and I was wanted to know if there was a reason. Do you think our sex life was lacking? Was there a fantasy? Were you just curious? It makes me uncomfortable for you to be looking at that and makes me feel as if I wasn't enough for you."

Is this how you talked to him?

Aside from the tenets of the church. Speak to him like a compassionate wife. It won't happen automatically, but he's got to see that the doorway is open. If already feels uncomfortable talking to you about it, there's no way he's going to be talking to an outsider about it.