|Wise Old Man|
...If she hasn't watched any fantasy movies or tv shows...then obviously the reasonable thing to do would be to try and encourage her to watch it, maybe share your Netflix account and start recommending her LOTR, GOT, etc...Maybe also send them some clips from YouTube.
After they've seen a couple of movies and episodes, walk them through a GM's story writing methods, and introduce them to "The Rule of Three."
Guide the two players as you write down 3 role playing events, i.e. a tavern scene, a traveling merchant, and the town drunk. And ask them how would they link those three events together.
Next, give them 3 combat scenes, i.e. a swamp beast, a cyclops, and a vampire sorcerer. Now tell them how they would link those events together, maybe also tie them in with your previous 3 role playing events.
And lastly, give them a reward event, and ask what kind of reward they would find based on those events?
Maybe the traveling merchant left behind a clue that led to the vampire sorcerer's secret tower, that has the "Ring of Invisibility", to pay homage to the LOTR movies they saw, so they can feel cool using it.
And then try running this game with them, with some alterations of your own to surprise them, so they don't expect every action. This gives the new player's an incentive to try and understand how they would want to role play their characters within those scenes. And gives them something memorable to think about.