Board Thread:Spoilers!/@comment-25361971-20150128004028/@comment-24674051-20150303144407

I really think that Marian is just a very smart lady. even though she spent much of 4A as a popsicle, she was awake enough, I think, to put 2 and 2 together. She figured out that, from Robin's perspective, She had been thought dead for 30+ years, and he had moved on with his life, which is what she would have wanted him to do.

Of course, being a smart woman, she could simply have decided that she was no match for the (not so) Evil Queen, and just wisely moved aside.