Hi all, i hope for some insights from others here:

My partner and i have been open for 10 years. This is going very well. We have young children and choose not to share this with them, not even with our parents. They live far away and are too old to do anything with this in our opinion and we have no need to share it. I have a FWB (also romantic feelings) for 5 months now. We see each other once a week. It is super fun and relaxed. He is divorced and came on my way. We immediately discussed what i can/cannot be for him and he thought that was perfect. He has a son for 50% of the time.

Now I notice that he is slowly telling his friend and fam about us. Which I think is fine, but he is not telling the truth, he tells them that we have a LAT relationship. He thinks that it is none of their business how things really are and wants to introduce me. There is a family party soon and he told his parents that he is bringing his new girlfriend. And then asked me if I wanted to come along. I find the order of this awkward. But okay, I want to come along, but then I have to lie to his family and say that we have a long distance relationship. I have checked again whether he is okay with the situation as it is now, and he says he is.

But I still have doubts about this whole family event. He has basically never been non-monogamous and does not date others. It feels like he makes something out of our relationship that its not.

What are your thoughts on this?