So, I've been reading lots of post here and just felt like writing my personal situation down might help me navigate some feelings I'm experiencing. I would love some insight from people that have been in a similar situation as myself or my partner.

I am a 30's M and my 30's F partner of 3 years recently has come to terms with her bisexuality. This wasn't really a surprise to me as she has made comments and role played scenarios in our sex life that includes fantasies with women. A few months back while out drinking with some girls, a girl kissed her and she kissed back. She immediately told me about it and it was a fairly rough conversation as the foundation of our relationship was built around monogamy. She recognized this and felt like she betrayed me, but she also expressed her interest in exploring that side of her sexuality. We talked extensively about what that might look like and we began to set some boundaries. Ultimately we agreed to keep talking about what all of this would look like. She downloaded some apps and promised to be transparent with what she was pursuing. We agreed that if she were to have a night with someone that it wouldn't ever go any further than a one night stand. We both are not interested in a Poly relationship. She has also expressed interest in bringing a 3rd into our sex life from time to time, but she first wanted to have a chance to explore her sexuality one on one with a woman which is understandable. The idea of a threesome is exciting in some ways, but it's not something I need or have ever sought out. Despite all of this, I still can't help but feel scared and jealous. She hasn't met up with anyone yet, but recently left on a work trip with the intention to meet up with someone. We talked about how we were both feeling and I told her that despite being fearful and nervous, her doing this in a new city far from our home gave me some form of reprise as it helped bolden that boundary of one night stand. I was really looking to connect with her physically before she went on this adventure to help instill confidence in our sexuality, but that didn't happen. Now, I have a horrible pit in my stomach thinking about her being intimate with someone else. The uncertainty of what happens after is killing me inside. I don't want to lose her and it truly feels like a "damned if you do, damned if you don't" situation. If you have been in a similar situation, how did you navigate it? If you were on my end, how did you manage your fears and become more comfortable with the idea of your loved one being intimate with someone else? If you were the one trying to explore your new found sexuality, how did you balance your desires and not blow up your relationship? Any and all perspectives are welcome. Thank you in advance.