I think Atika and Nessa were both the honourable woman.
Yes, Monica was killed and then the door hung back up so it would look like a suicide. The Americans killed her to cover up that she'd been working for them to discredit Israel.
The last shot of Nessa meant, to me, that she would spend her whole life metaphorically imprisoned. And I agree that I think a lot of her guilt stemmed from her mother dying in childbirth, and also from her being the child of a Zionist arms dealer.
The only point of Hugh's wife as far as I could tell was to show us a bit of his personal life. The human face of the secret service. I was a bit disappointed that she didn't turn out to have more significance.
I think the Americans were so invested in Nessa and her business because she was the one working to bridge the Israel–Palestine gap; if there had been an Amercian businessperson doing what Nessa did presumably they'd have invested in them, but Nessa was what they had.
One niggle: I still don't know who Nessa was talking to and what she meant when she was on the phone way back and said 'They know.' Who knows? And what? It can't be 'The kidnappers know Kassim is my son' because of course the kidnappers knew that.