Mum: Oh my God, I knew that was Captain America from the back. When did I turn into this person? This is ridiculous! I didn't even need to see his face!
Also, whenever she sees Loki, she always says 'I still can't believe that's Tom Hiddleston' in a voice like she knew him as a child and is baffled that he's grown-up to be a super villain. Though, we did see him in Cranford before Thor, so that's basically what happened.