The idea of movie poster is to make a movie appealing to viewers, as well as to represent what happens in a movie. Names of staring movie actors and the author can be appealing to some people, but they do not represent what happens in a movie. <em>The use of colours </em>can also be significant for the general idea of a movie, but <em>images</em> are the most important part of a movie representation.
Situational irony! Because, she initially thought she was free from her husbands wrath. She celebrated and her heart was happy, this only to end with such a heartbreak that it kills her.