Ah, There it is this is the one i was thinking of (or similar)
Girl on top type positions where your supporting her would also work. Trying it in a chair looks like an option too, (where her feet are still on the floor possibly)
Depending on how comfy she is with feeling she has less position control, and how good her knees are obviously, you can also do This one
All else fails, you can turn the collars around, so the hands are done up in the frount
