Years ago (early 2000s I think) I watched a scene of a movie where a woman is secretly in love with a married-with-children guy. One day she wakes up being his wife and mother of his child, and the wife has the life she had earlier. Everybody acts like it's totally normal but she remembers her life used to be different. Also, she was a friend of that family, I think the kids named her "aunt Jeanine" or something similar.
I also remember that the main character was secretly in love with this man because she was a friend of his wife or something like that. She was like a spinster and secretly envied her friend for being married to him. In the scene I remember, she wakes up and goes down stairs, find the man at te kitchen who greets her affectionately. She asks him something like "you where not married to ..?" And he went like "??? Why her???", there she realizes that he changed his life with his wife.