There are no records of "workings" between Harris and Crowley, and I seriously doubt that any took place. But it's safe to assume that Crowley did instruct her in the theoretical aspects of sex magick. Some of the Thoth cards are so explicit it's hard to imagine how Harris could have been ignorant of it. It probably also tells you a little about Harris herself. Can you imagine a sexually repressed prude producing such provocative and daring works of art?
Well, since P.J. seems to have dematerialized I'll attache my comment to yours Aeon. You obviously understand the issue but I felt to post this for those more ignorant on the subject.
I once did a reading for a very elderly lady, how embarresing ... everything seemsed to be saying, 'this girl is having a wild and passionate time ... sex was dripping from the reading. At the time i thought it was just my deviate interpretation so i modified it for her (what a bad reader!). At the end she took my hand and cleared it up, her situation was exactly as I had intuited. Then she says "The older I get the better sex gets."
Dont think that for a monent if a woman seems 'too old', or whatever for sexual tantra or magick that will be the case. It might turn out she is sooo much more capable than a wild, reckless, ego-driven . . . . (rant rant )
How dare you sir! harrumph!