A single pin sight is highly recommended.
See how she shoots, some people take to it quickly.
It is awful late in the year to launch this adventure,
I really don't like the idea of dumping a rookie off on their own.
Just like we did, rookies are inclined to screw things up if left to their own devices.
If your buddy is lucky enough and can have a ground blind set up for her.
He needs to get in there with her and coach her on what is going on.
If she is not ready - HE needs to get in the blind with her and kill something and see if she is OK with the whole adventure.
No real sure about this start her off with a gun either.
If you are going to start her off hunting - I would start her off with squirrels, rabbits and stuff and see if she is alright with the killing end of the sport.
One of the guys in our club started off his GF bowhunting, her shooting abilities were OK, she was alright with a ladder stand.
He puts her in the stand (out of his line of sight-bad move), a small buck comes by and she whacks it - Spine shoots it.
The deer is laying there 50 feet away, bawling, kicking and thrashing - she starts crying and drops her bow and watches for 10-15 minutes at what she had done - Never hunted agian.
Two people in a ground blind HAS to be the best way to start a lady off, maybe let her hunt with a video camera for her first experience.
IMHO