I'm really sorry that this has happened and glad that you've reached out. You need and deserve some support right now, and we 100% have your back. This is really sad news, you've invested years into this relationship and it's been hard. On the surface things have been great but there's been issues. Instead of always feeling safe and supported, you've often had rejection, felt frustrated, he's nagged you and controlled you.
This is a terrible shock. He's avoiding sex with you, but then using porn, that's difficult enough. You've found out he has a sexual interest in children which is devastating. How can you carry on after this? But you're in a position cos of finances and because the police are corrupt... if you report him, he could find out it's you. Is he manipulative at all, or hold a grudge? Because if he finds out you know this, he could do something that would cause you problems.
Have you read Why does he do that? . It can help you identify what risky behaviours he's showing and work out next steps. I've literally never known a woman regret reading this book.
Whatever you decide you've got our support
Non binary and gender fluid are included, where I'm from their considered under the trans+ umbrella. It's a valid point I should write that in the rules thanks. And yes it's women only