Was it love at first sight?
I just saw this movie and I really enjoyed it. I do have some questions about it though. When did Mr. Tilney start to fall for Katherine? According to the movie he seems to be delighted with her when he first sees her, but I don't think he thought of her as a romantic interest yet. When she doesn't meet up with them to go for the walk he seems cold and uninterested in her completely. Then she explains and he seems to warm up to her again.
Then when she goes to stay with them he talks about hoping the person he loved would have money. He has to know she doesn't have much money. He doesn't seem to reassure her, but he does state that it would be a show of his character if he were to be in that position. However, he does show her his house and is glad she likes it. This leads me to believe he wanted to propose to her soon. I wonder if he was on the way to do that when he found her in his mother's room. Anyway, I'm just curious as to when he possibly was in love with her.
I feel her love for him was immediate. She had that fantasy about him the very night they meet, so she's not so hard to guess.