Then the problem is just with your addictions to porn and not crossdressing, but I guess it makes a convenient scapegoat?
I think we hear from plenty of men who were in that group but end up here saying that their wife found their stash and now it's over.

Why not just get counselling for a porn addiction problem?
There is absolutely nothing wrong with crossdressing and most of the STOP voices are going to be from people who are doing it for "moral" reasons.

From the wording of the OP she likes crossdressing, so why not try to decouple the sexual feelings from it or at least work on self-control?
That's even if she wants to decouple them, it's perfectly okay to dress for sex reasons but anything done to excess has the potential to be harmful.