Response to the Last Part of the Handmaid's Tale

In the last part of the Handmaids' Tale, we can see that all of the stories are stored in several tapes and the names the characters are just code names. Also, in the Historical Notes, the professor Pieixoto introduces the reason that why the handmaids are always wearing the red cloth. The designer, Limpkin "seems to have  borrowed from the uniforms of German prisoners of war in Canadian camps of the Second World War era."
    At the end of the Section 15, Offred is found that she keep making appointments with the commander,and is helped by Nick, who maybe belongs to "May day". According to the historical part, we can see that Offred is out successfully.
    Also, in the last part of the book, Nick and Offred at last fall in love with each other, but they never point it out, because in Gilead, it is illegal. However, when Offred is in trouble, Nick still try his best to help her out, for they believe that Offred has already had his baby and he dear the relationship between Offred and him be exposed. Here, I think Nick is a kind of selfish person. Though, he considers Offred as well, I think the motivation of him to save Offred is that he want to save him kid, and do not want to lose his job. So, I think he is a selfish people.