Hi, and belated congrats on getting the license from a fellow Sherburner.
Is the response normal? Yes and No.
My wife came up once (sat in the back during training with an instructor up front) and also doesn't plan on ever coming again. The instructor in question (JC) did his best to chat her up, err, I mean talk her round, but to no avail. She screamed every time we hit even mild turbulance...
On the flip side, my daughter (8 year old) loves it and has been up several times. She's mad for it and demands we do stalls and steep turns on each flight. She likes to take control but can't actually see over the 'dashboard' yet. She wants me to learn aerobatics so we can go upside-down! Perhaps it's the age difference - 4 is probably a bit young to appreciate the experience fully.
Another early passenger was Mum - who threw up over the Humber Bridge (not literally!) on the same trip you did.