My opinion (and it's just mine):
1) This lady seems to have good spirit, even if some of it may be misplaced. That's good, since you have a pretty nice foundation on which to build.
2) Kindly explain to her, that everyone in the classroom is there to help each other, and not to antagonize. You're all there as professionals, and comrades, and aren't there to beat the stuffing out of each other.
3) Also explain to her, about the merits of practicing with control. By all means, encourage her to go hard, but to also practice the art of pulling one's punches. Explain to her that the principles of tapping the gi versus giving an all-out hit are still the same; one stops at the surface, the other goes 8 inches beyond.
Now, if none of the above are helping...
Some "gentle" humility lessons are in order for her. While nobody should be out to harm her, or even hit her with a brutally hard shot, it wouldn't hurt to let her spar with the more senior students, or yes, even the instructors. If their defenses are good, they can deal with her hard-charging, sloppy techniques.
If she realizes that her techniques aren't getting the job done, maybe that will open her mind to a much greater world. If, though, she continues to persist, then it wouldn't hurt to give a decent thumping shot as a gentle reminder that her methods could use some refinement. Since she's experienced, and has probably taken her share of hits, this shouldn't be too shocking to her.
Above all, be patient. It's probably going to take some time to erase some of the misconceptions that she has learned. If you can help her overcome these, then you'll get the enjoyment of having been a significant contributor to her becoming a fine student.