I would add that once you realize that Dinah is suffering form undiagnosed and untreated PTSD, her marriage to Oliver makes perfect sense.
Heh. I don't know how much I hold with that, but certainly something happened out there that caused a significant shift.
I mean, I've said it before, but it's interesting how much Dinah is already pulling away from Babs, here. First off, calling Ollie instead of Babs - having a duly elected mayor with red tape and bureaucracy to deal with pull strings, spend favors and waste political capital in order to get your new kid into the country instead of having a master information manipulator fix you up in the time it takes her to microwave her danish... it's not sensible. And when Babs feels automatically entitled to make some comment on Dinah's decision, Helena's all with the "this isn't your call, butt out," which I don't picture her saying if Dinah weren't coming across as being patient with Babs more than actually listening. (The dialogue could go either way.)
It's a huge change from just a handful of issues prior, when Dinah was basically being Ms Power Of Attorney for Babs before the Braniac surgery. Babs thinks she gets to have an opinion here because as far as she knows, she does - that's how they've been for years now, always talking out these huge decisions together, wanting to be sure they have each other's support before they do massive stuff like adopt kids or go in for life-threatening surgery. Then Dinah discovers Sin, and suddenly she's withdrawing, she's going through Ollie to get this kid into the country (and the only reason I can think of for that is so that she didn't have to have this "are you crazy? What happened to 'I won't make orphans'?" conversation until it's too late to make a difference), she's not telling Babs about Ollie faking her kid's death or even that Ollie proposed in the first place.
It's very weird, and it does kind of demand that something be up with her.