Sounds like she wants to share your love of bikes. Good for her and good for you for introducing her gently. Personally I don't enjoy being a pillion - no control and limited vision, so because i'm aware of that, I am always extra careful when I take my wife as pillion. I know it would be so easy to scare the crap out of her and she would be always nervous after that. So far she is a confident pillion and always enjoys the ride.
For similar reasons I never tell her about my close calls when riding solo.
