I am not sure what my marital status or former marital status or relationship status or anything has to do with this. Or with being a parent. My relationship history is not the issue here and bringing it up like this is just rude and hurtful. You don't know anything about me, who I am, or my family.

But on to the actual issue at hand:

Porn may not be something that you want in your marriage, but it seems like he does. Policing him about it will not get you anywhere. You need to decide if you can compromise on it at all. If you can't compromise, then perhaps you need to divorce.

I'm not sure why it's all on him to change. Does he share your beliefs about porn? Is it a deal breaker in the marriage for you?

Also, it's possible that your sex life is healthy and active FOR YOU, but not FOR HIM. Are you considering his needs at all in this?