Feeling Lost and Afraid of My Husband's Disapproval

I’m a freelancer working from home, married for five years. Recently, I started exploring certain adult websites that focus on taboo content, things my husband wouldn’t understand or approve of. It’s scary because part of me feels like it might be a phase, but another part is terrified it could grow into something more serious. Before I know it, I’m spending way too much time there instead of working. What should I do? Am I being a bad wife for indulging in these fantasies, or are some curiosities normal within limits?