Does my coparent "owe" me the truth over this?
Long story but I (30s F) split from my ex wife (also 30s F) last year after she had an emotional affair -- that I'm pretty sure was also physical, though she never admitted to it -- with a mutual friend of ours, Cora. When we split up, I asked if the affair was over with Cora and my ex wouldn't tell me one way or the other. She said it wasn't any of my business.
Cora is still with her wife, who knew about the affair and accepted it, and my ex is always with them now -- so much so that I've wondered if they're a throuple or something, as it's hard to imagine how or why the wife would put up with it if not. I'm currently on holiday with our kids in my home country, and every single time my ex has called she's been at their house, with their kids sitting in her lap. Recently my sons (6) told me that Cora's daughter (5) has told them multiple times that they're all going to live together, they'll be her brothers, and they'll never see me again. When I mentioned this to my ex (in a very non-accusatory way) she said not to read into it but didn't deny anything either. During the affair she actually talked about us all living together like some sort of commune, so it's plausible that they're actually planning this.
I can genuinely say that I don't care if my ex is still sleeping with Cora, her wife, or anyone else -- the three of them treated me like absolute trash and as far as I'm concerned they deserve each other -- but I do want transparency about whether or not they're still romantically involved if these people are planning on living with my sons for 50% of the time. Even if that's not on the cards, the dynamic is unusual, it's obviously confusing for the kids, and the possibility of conflict seems high.
I know if I ask I'll likely be told it's none of my business. Do you think that's true, or am I within my rights to ask for transparency given my kids are involved in and affected by this?