perhaps delicate might mean emotionally fragile? a person who has experienced a lot of trauma in their lives doesn't necesarily respond to stimuli the same as someone who hasn't, and doesn't respond the same every time.

sometimes you can't know what will set them off till you hit that limit, and sometimes all the talk in the world won't find the boundaries before you cross them.

in my experience just experiment slowly. slowly push your (both of your) boundaries and be prepared to spend a lot of time comforting her when sh*t doesn't go as planned

it's worth the investment in time i think.