Remember most collored candles wax is sometimes substantially hotter on the skin than white candles. I also advise testing whatever your going to use, on yourself first, much as a parent does thier babies milk, if it burns you its most certianly going to hurt her worse, especially if she has sensitive skin. Also some people are allergic to different kinds of wax, so a skin drop test might be a good idea before you go hog wild. Proceed in small increments.(20 minutes should be long enough to see if she is having a reaction).

I also reccomend a non-permeable fabric tarp of some kind etc to protect the floor ,especially if you are going to be on carpet, (i have had a hell of a time getting it out of the carpet here at my desk, lol (winks)

As for a cane to keep her from hitting sub space, good luck, all that would do to me is drive me into it faster. (unless you happen to know that a canes works for her) I suggest talking to her, and taking frequent breaks to reassure her of her own self worth and how much you value her fufilment. Reminding her she isnt an object can do wonders to help avoid compartmentalizing on her part.