Just keep working on her. Invite her to watch the game with you. My wife is on the laptop and watches it. She buys me husker gear, so that is a step. She wants to go to the game this year when we fly in from AZ. So at 5 years she wants to go....so that part is nice.
Just let it settle in..might take a bit but she will come around, or in the case of most marriages at least act like she likes it.