The Decision That Changed Everything

So, here's the backstory: I’m a personal trainer and my partner is wonderful in every other aspect, just not into some of the kinks I am. We’ve been together for years, and there was this one time when we were at this kinky party... no, that’s too vague. The truth is, I had an affair with someone who shares my interests and it felt so right, but morally wrong too. Our sex life is amazing, except for these small things, like role-play scenarios involving control dynamics, which she just isn’t into. It was a split-second decision to be with this other person. The physical acts were incredibly intense... I won't go into detail, but we explored some really heavy stuff that made me question my boundaries and morality. What am I supposed to do now?