wow!
thats alot of choice, even if you narrow it to just types of tajiquan.
i would recommend that she do wing chun. reasons:
1. if you already do it then its easier to find a good class, to know if a teacher is any good etc.
2. its good for 'women' and small people (big strong tough women can do it too!)
3. you can practice together
4. you dont have to start something new yourself.
5. theres so much choice its better to narrow it to what you know.
from my experience, some qigong is good too - for the health benefits.
But, i think for any one to answer this question it would be better to tell us some more about the situ ie:
1. how long have you done wing tsun?
2. how much do you know about other CMA especially the internal ones?
3. how much time do you both have to practice?
4. what kind of personality does she have? is she direct or cunning?
6. does she want health or martial benefits?
7. if she really doesnt like wing chun then why not???
hope it helps
Ecce nunc patiemur philosphantem nobis asinum?
what transcends the buddha and the law? Cakes.
"Practice is better than Art, because your practice will suffice without art, while the art means nothing without practice." - Hanko Doebringer, 14th century