Hello,
My lover and I have been dating for almost 3 years, and we’ve always been open.
Are you living together in a committed relationship, or not? I am wondering where on the relationship escalator you are. If you're becoming enmeshed, sharing a home and finances, it seems different than if it's just "dating," in separate homes, with more independence. It seems like your partner is pretty independent.
Before it was ‘don’t ask, don’t tell' (what they were comfortable with), but now we have a much more open communication style, and we let each other know when we are seeing our other lovers, having sex, etc. My issue is, my partner has been dating someone for a few months now, but I don’t know anything about their relationship. My partner says that they feel very uncomfortable talking about it, and their boundary is not talking about it.
So it seems to you like you've gone backwards, progressing from DADT to more openness but now back to DADT about this current metamour. I do wonder why things changed and your partner doesn't want to be as forthcoming this time. Maybe they decided they didn't like being more transparent.
I would like to know how they’re progressing, and I also like the idea of possibly meeting her.
Some people want to meet and get to know their metamours and others don't. Being real friendly is called kitchen table poly, and keeping partners separate is called parallel poly. Maybe you and your partner have different styles of poly: you prefer a form of KTP and they prefer something quite parallel, with more privacy.
Is it wrong for me to question my partner about this some more? I don’t want to overstep the boundary.
You can always ask questions and make requests. It understandable you're curious. But then, your partner has the right to not want to answer your questions and to keep this one partner on the other side of that boundary, for whatever reason.
I have found that most polyamorous couples don't do a complete DADT, because it really can reduce intimacy to not know whom they are dating, get a bit of info about what they did on their most recent date (stayed home and chilled, went to a cool restaurant or event, took a trip, took a nice walk somewhere, did household projects, etc., etc.) It's also nice to know in advance who gets to be with whom for birthdays, holidays and vacations. And I definitely appreciate knowing what stage my partner's other r'ship is at. Are they in love? Have they met each other's siblings /parents? Things like that can affect my r'ship status with my partner, and my own plans, in a general way. Like, will I be seeing more or less of partner, if they become more enmeshed or, on the other hand, break up?
I don't need to spend tons of time with my gf Pixi's bf Malachi (my metamour). He's an introverted person so we don't see each other much. It took me seven years to even see him for more than a minute or two at the door! But gradually he has warmed up to the occasional meal together, say two or three times a year. And he's met my son, some of our friends, and my bf Aries too. On the other hand, Aries is real outgoing and would probably love to spend more time hanging out with Pixi and Malachi, but we do have some boundaries in place, for reasons of our own. That's just my example. Everyone does it a bit differently.