First time poster(nb27), Polya for the past 6 years. bit of a long post, TL;DR at the bottom

have a partner(nb26) who reads this board fairly often and that I talk about our relationship fairly often and the things we read on here.We met 3 years ago at pride and recently celebrated our 1 year of being partnered and I feel so lucky to have them in my life. Hi G, love you if you're reading this! <3

So! My current polycule includes myself, G, my comet partner N (F27), and N's partner D (M27). N spends the majority of the year teaching english in Europe and visits friends and family here in Canada from early July to late September. N and I knew each other through school and in 2017 we briefly dated non-monogamously before I got pulled into a bad relationship for a couple years. N continued to date a mutual partner of our monogamously for years and began teaching overseas in 2018. Our relationship was distanced but not damaged and we reconnected as platonic friends in 2019. In 2020 N separated from their partner and began dating D after a long time of crushing on them but not acting on anything because of their monogamous partnership, Ad and An are very cute together and seem to get along great.

Our history and relationship has some more depth and detail than that which I have discussed with G. I am very lucky that N and G know each other through mutual friends and get along well, they both have an interest in being friends with each other which makes hanging out with both of them at the same time possible which is a lovely glowey feeling for me.

In the summer of 2021 N and I had our first solo hangout together in a long time and at the time G and I had discussed the possibility that something may happen or that N and I might rekindle some sort of a relationship together. N and I hadn't talked about what might happen between us at that point. After a really nice time reconnecting N was eager to initiate things with me but I wasn't sure that N had had similar talks with D and held back from getting intimate with N. The following morning D called N and was having a panic attack over whether or not N and I had done anything, N helped them calm down but I wonder if something had happened between N and I if would it have been possible for them.

After that N and I had 1 more date that summer, we kissed and she hopped on a plane the next day. I was happy to have had that time with her and have missed her all year.

Since then N and I have talked about what might happen between us when they come back next and I think we're both on the same page and excited for the same reasons to see each other. I have talked with N about where D is at with things and it seems like he might have a relationship to explore back in Europe and N has encouraged D to pursue something which may help D feel more comfortable in non-monogamy. As far as I know there has not been an in depth conversation between N and D regarding N's relationship with me and D's comfortability with it, when I asked N about it they told me they mostly were focusing on helping D deal with anxiety attacks so they did not know how to approach the subject with D. D has been going to therapy though so hopefully that helps them as well.

This summer N has come back from a year of teaching and has brought along D for a couple weeks to visit with them, I would like to make the most of the chance to get meet D. Maybe it would help him to know that I'm not in some sort of competition with him or even that we could be friendly or friends on the occasions when we do see each other. I'm trying not to have any expectations of what might happen in meeting him but my main hope is by meeting me I will become a tangible person and regular human and not a threat to their relationship. G has suggested a double date to an art gallery, G is so lovely and smart and I appreciate their support so much.

TL;DR:
Have a long distance partner I get to see for a short time once a year, their partner is visiting along with them for a portion of their visit. I want to meet her partner and calm their fears about non-monogamy or me as a person and don't exactly know how to go about doing this. Feels like a somewhat necessary part of pursuing a relationship with my LDP.

Any relevant experience, perspectives, questions, or advice is welcome.