I'm not married but have an open relationship with my partner. I have a sexual relationship with another man who I see once a month.
We met him at a party together, all got on well and he subsequently messaged me to say he was interested in me and could I ask DP how he felt about that.
DP and I talked. A lot! About insecurities and jealousies. About what worries us. About what we both want. About needs and desires and how to meet them. We read and researched and talked to others. We realised that jealousy comes from a place of fear, of losing something, and that you can choose not to give it that power. You can choose not to be jealous. You can choose to trust how your partner feels about you.
DP knows I put him first every time. If he told me to stop, I would, without hesitation. He's my primary and my priority. I love him. He also knows that the other guy is not a threat to our relationship, I don't see him as partner material, just as someone who I enjoy kinky fun with.
There have been sticking points. DP struggled when he became aware of the emotional intimacy. I told him that we'd gone for dinner and watched a film. These "couple" activities bothered him more than the sexual side. I've explained that, for me, there has to be an emotional connection, especially as there is a D/s dynamic. Besides I wouldn't fuck someone I couldn't be friends with!
Although my other man sees a handful of women, he started making noises about how I was special and he'd like to see me more often. DP is worried he's falling for me. Again, I've reassured DP that I'm not going anywhere. I'm with him. Next time I see my other guy (obviously post lockdown), I'm going to set some boundaries and make it clear what I can and can't offer him. We'll see where we go from there.
It's not plain sailing by any means because there are emotions involved so you have to navigate that very carefully. We're still exploring and learning as we go but, in my experience, all long as everyone is brutally honest, open and respectful of each other, non-monogamy can work.