And everyone else seems to have, at least temporarily, calmed themselves down. OHP seems to have persuaded Nella that, while NA can do what she needs, it can't necessarily do what she wants. She admitted to them that she'd looked at other agencies, and they told her that she wouldn't get more elsewhere due to her state laws. She told OHP that yes, she does want the siblings to grow up together. NA seem to have found a route that they and Nella can live with.
And I spoke to Nella myself yesterday and she also said something about advantages of the siblings living together (though oddly she was proposing an advantage for us, rather than for the babies or for her - though I added how nice it would be for us all to have visits together). She also apologised for sounding a bit off at my last couple of calls, saying she been napping. I am not sure if she knew she'd sounded odd, or if she heard something in my voice, but it's true, she did sound more relaxed and clear this time. And she does usually apologise if, for example, she sounds unsure when she picks up the phone (as our number comes up as private). I think she is calming down a bit, though this could be temporary, and I'm also more inclined to try and call more regularly, which can only help, I hope.
And Mr Spouse is also feeling calmer. We got another bit of paperwork back, and we've got a full day of lovely social worker (she is lovely, but a full day of talking to her is a bit daunting), on Friday, so we can check which other bits of the UK paperwork need chasing. We haven't got any of the extra documents that we need from the UK but for the OHP requirements, except for one thing from Mr Spouse's employer (and the fact that my employer hasn't done theirs is the least surprising thing to happen this entire year, I have to say). So I'm giving those people another couple of weeks and then chasing them down, and sitting outside their offices if I have to.