The Lying Lie

Hey there, so this might seem weird for the 'Cheating & Affairs' category, but here goes. I've been with Alex for a few years now, and we both agreed to be monogamous, which was fine by me because I'm not into non-monogamy. But there's this one thing...I have these kink videos that I watch alone sometimes, stuff like age play and CNC...Alex doesn't know about it though, because they're not a fan of that kind of thing. The other day, I saw some friends sharing their kinky content online and I felt tempted to join in, but I didn't want Alex to find out...so instead, I told them I was just watching a movie...I lied...felt so wrong afterwards though...didn't think something like this would ever feel like cheating, but here we are. This little fib is eating away at me now. It's not about the kink itself, it's about betraying Alex's trust in our honesty with each other.