My answer might be a little off from your question. However, I can provide you with some common plots in web novels. I hope it will help you. According to my knowledge of online novels, usually, when a girlfriend suddenly says that she's moved in a certain scene in a movie, it might be because this scene touches some kind of emotion deep in her heart. Perhaps she had experienced some kind of scene or some kind of emotion depicted in the movie that resonated with her. Of course, it was also possible that she wanted to express her feelings but couldn't find a suitable way at the time, so she expressed them through watching movies. As for what your wife wants, you might have to find out and understand it yourself. Sometimes, his girlfriend's way of expressing herself might be more obscure. He needed to understand her psychology and needs through details and communication.