Oh my god. This is too good to be true. Firstly I love the way your dog played matchmaker. He must have seen her and thought she was perfect for you and created the scenario for you two to meet.
Secondly, it is a HUGE positive sign that your wife to be expected you to pay. It means she saw you as a potential partner. If she didn't fancy you she would have insisted on going halves as she would not have wanted to lead you on.
And on the basis she was right and you eventually married her, I am on TEAM WIFE