I fail to see the threat of pornography. No credible research has linked the viewing of it to violence, deviant behavior, divorce or anything sinister. A lot of politically motivated research has tried to make those links, but the conclusions are so pre-ordained in those studies that it’s hard to take them seriously.
Sick behavior has roots far deeper than images on a piece of paper or screen. If your husband still treats you with respect and behaves the way you expect and want him to, I wouldn’t be threatened by it.