Even if I was mentally stable to become a T I'd never want to be one- so no that one'd never apply to me.
I think it depends on your reasons to become one- her influence being one is fine, shouldn't be the main though. I do understand why you're so nervous about it- it's stg along the lines of asking if you're good (i.e. stable) enough... Have you thought about what'll her opinion mean to you +ve/-ve one?