Have anyone here been in an actual open relationship where you're still dating/engaged/married but also seeing other girls?

Women can be complicated when you become as monogamous as possible, so I made a decision to "cheat" on my partner at first. Now that her behaviour has gotten worse I started telling her that I've been dating other girls but she's still my number 1 option for settling down.

At the moment she doesn't like the idea but has to accept the fact that I am seeing other girls for sex & intimacy. I haven't made any promises to the other girls as I know my priority, however I am giving my number 1 partner a chance to correct her behaviour and I will stop dating other girls once I'm satisfied with her changes.