...she clearly didn't get sick as I typically (and frustratingly) do!
Silvaire, try this (page 3 is of particular interest):
http://medind.nic.in/iab/t07/s1/iabt07s1p37.pdf
I did and haven't been airsick since. If those exercises don't make you ill, aerobatics never will. Frankly, the exercises made me an awful lot worse than aerobatics did and I vowed never to be ill again.
A friend of mine swears by a Mars Bar and a full fat Coke before you aerobat. The theory being that the glucose forces your stomach to concentrate on digesting the sugar rather than bubbling away. Something some of the Battle of Britain chaps used to do allegedly, albeit they used neat glucose, not chocolate and an American brand icon.
In case some of this sounds familiar to some people, I used to post under another identity until relatively recently.