This is mind blowing post where you can read about her motivation and I think it`s on point!!! When I read it and talked in the comments with @realityisforpplwhocantdream I think i finally understand something. Not all but something…
About cold fusion, enclave, House, Barb, Moldaver and Cooper.
Start of the season 2... Moldaver is strangely well "informed" about Vault-tec plans, about Barb`s next move and she tells Cooper that House want cold fusion and in exchange will give bombs to Vault-tec and he would press the button. And want Cooper to kill him.
But when Barb speaks with false House he said that he gives them control devices for cold fusion, not bombs. So why Moldaver think of bombs?
Cooper go to Vegas with his wife and Hank. He wants to talk with House, not kill him. When he meet him House told Cooper about the third player. And then after 200 years House told him that Cooper should have brought cold fusion to him. Why?
Because House knows everything, including that Cooper knows about bombs and talking with Moldaver(and she wants him dead), and House figured out that Barb and Hank wont give him cold fusion, but will give it to enclave. He knows that president will be in Vegas too and he knows that president with enclave. And he figured out that to do that they need House dead. I think House thought that if he push some Coopers buttons, he will interfere with his wife and prevent transfer of the cold fusion to enclave and maybe even would be smart enough to bring cold fusion to House.
And Cooper did interfere, but Barb manipulated Cooper so that he completed the deal himself and handed over cold fusion to enclave himself.
And they didn`t even need to kill House anymore because cold fusion was stolen oopsie!!
(Cooper talked with wife and goes for Hank. Barb play along with Cooper, help him extract cold fusion, let him tell about it to Welch, and then kiss him before he give it to president. That`s just brilliant)
So what I thought is… Either Moldaver with enclave and it would explain why she`s alive after 200 years and why she knew Wilzig, or she was fed false information from someone from enclave. Hank maybe? And enclave manipulated her and wanted her to take the action and organize House assassination and insure transfer of the cold fusion to enclave and not House. Or she did this voluntarily if she sincerely thought that enclave wanted to stop Vault-tec and end of the world but she was manipulated all the same
I think Barb as enclave agent goes behind of the back of the Vault-tec and plan to transfer cold fusion to enclave but to do that House must be neutralized and here is where Moldaver plays her part. But maybe Barb didnt expect that Moldaver will drag her husband to it. And when she realized that he is involved she decides to use him and sacrifice him because as Steph said "the future is bigger than us"... he did all the work and took all the blame. Enclave got cold fusion, Barb stays at Vault-tec unsuspected, and got real good vault spots at the enclave for herself and for Janey. Cooper didnt know and didnt realize all of this and that's why he look for them at the Vault-tec vaults and didn't find any info.
There is a chance that it was Hank behind all of this but I`d like to think that Barb plays much bigger role in the whole plot and not just someone`s pawn.