I am with Shodan on this one.
Unless you come up with a trick of your own and named it after her, you really don't need to show her a "mini miracle".
Chris has NEVER done a trick FOR me, I think we're stronger and better people because of it. My mother and father have been married for 35 years and Dad as never once showed my mom a card trick.
Learn to talk to her and think of what SHE likes to do. Take her to a show, to the zoo, to a chick flick, to the mall, out to dinner, on a road trip, a ball game etc. . .
You don't need to impress her with card tricks, trust me.
Learning a trick for someone and having her (or his) eyes roll when you whip out your cards, coins, tissue paper or fake flowers is NOT a good feeling.
Just my two cents.
Katie Egleston