I have been up with a few mates and they all have their preferences.
Some like you to fly sometimes, some like you to help with high workload times like reading checklists to them and such.
ASK BEFORE HAND!! she will tell you wether she wants the help!!
You can do things like keep a good look out for her for aircraft, landmarks etc.
DON"T do anything that she wouldn't be expecting like play with the flaps on takeoff if you think that they need retracting because you could scare her.
Have fun is probably the most important thing!
Drop into leicester i will be there!!!!
Very nice food and drink!!
Buckle up
Nick