Stardust- Your friend probably has to act ‘devastated’ to gain your approval. Let them be. Tell her to talk to her husband directly and I am sure they’ll come to a mutual solution. Your exasperation will just cause more problems. Now from a guy’s perspective; Almost all the guys I know have watched/ continue to watch some sort of porn. Luckily most of them aren’t addicted to it or find some of the sicker stuff out there interesting.
A husband watching porn has absolutely nothing to do with his wife. She doesn’t have to feel like she is doing something wrong. It’s just something a guy does once in a while. Bad analogy but think of it like having a craving for chocolate. If your friend makes a big deal about it he’s just going to find more creative ways to watch it.
So get off yourself righteous horse and be realistic. Also, many have said it before, a grown man watching porn and a child watching porn are two completely different issues. You are not your husband’s mom for god’s sake!