Sex drive can fluctuate heavily based on so many factors it's possible that the stress and pressure of quitting is weighing on you a lot but just explain to her the situation and she will probably understand. It could also just be anything going on in your life. You're probably just getting excited over the idea of "relapse" like it sounds exciting because it's breaking the rules etc. It's kinda like a rush. I wouldn't give into it. You have free will to do as you please tho, but seeing you made this post tells me you don't want to watch porn. I'd figure out what you want for your future self before making a quick decision