You have to remember Chuck Yeager was sick on his first flight. You get used to it.
I have a bit more than a few hundred hours and I felt a bit iffy in the back of an aerobat the other day (the pilot was going for it).It did make me realise how easy it is to put someone off flying forever especially on a first trip.
If I am taking someone up for the first time I alway limit the flight to a short one (20-30 minutes) and keep it levelish. If they say it was boring when they get down I'll happily take them up again and roast the sky.
You'll fight through and get over it then join the rest of us in ripping up £50 notes.