Should I teach stick-shift with my new yaris?

[Rain]

Aside from the risk on your NEW car, you are also risking straining your relationship.
First of all, did she tell you she wants to learn or did you just decide that you want to teach her? I think that right there makes the difference.
If she wants to learn, let her take the initiative.
Personally, I am enrolling in a driving school instead of asking my boyfriend to teach me.