Caught in My Lies

I've been in an open relationship for about six months now. It's complicated and freeing at the same time. I recently started seeing someone new on the side, but kept it a secret from my partner, thinking it was just casual fun until one night things got more serious than expected. We ended up trying some role-play that crossed lines, both of us pushing each other into spaces we usually wouldn't go. The next day, the guilt hit me hard and I realized how much I've lied to maintain this double life. How do I come clean without completely blowing everything up? Am I just a bad person for doing this behind their back?