Lost My Partner To The Kink I Introduced Her To

I'm in my early thirties and a mommy type who dabbles in DDLG. Last year, I introduced my girlfriend of three years to it as an addition to our dynamic after she confessed her curiosity one night over drinks. She was hesitant at first but agreed to give it a try, which eventually became quite enjoyable for both of us. We had established clear boundaries and consensual limits from the start, with no issues until recently. Last week, I received a message that my girlfriend had found someone else who also dabbles in DDLG, but prefers switching between being a little and the disciplinarian role. She admitted she found it exhilarating to be on both ends of the spectrum and felt her current partner wasn't challenging enough for her anymore. This came as quite a shock to me because we had such an established and comfortable dynamic. She explained that while she valued our relationship deeply, she needed this kind of connection with someone else now. It was clear from her tone that there were no hard feelings or blame directed at me; it's just the way things are evolving for her personally right now. We've agreed to continue seeing each other in a non-DDLG context, but I'm left questioning if I should try exploring more dominant roles myself to keep up with my interests and maintain stability moving forward.