Whilst it is very admirable that you would want to include her in that part of your life, remember that sometimes it is good to have different interests. Simply for the fact that variety has it's uses. But, if she is keen, then great.
I have a rather different scenario to face actually. I have started in 40k gaming from the wrong end, being a PC gamer by default, then finding out about it that and getting into things from there. I am currently considering moving into TT, at least painting to begin with, but am a little concerned as to how the wife, who has had to put up with for nearly 15 years now, will respond if I adopt another past time that focuses my attention on something such as this. An understanding lass she is, but everyone has their limits etc. Unfortunately I am of the generation where the majority of the girlies didn't really get involved in such things in the same way they do now.