What a nice thread

Right. Let's start with what we know:
She likes you, obviously - This is always a good start.
She is excited by the thought of decapitation - Probably not worth over thinking this one, though you should lock away any sharp knives just in case.
To play or not to play:
I think this one comes down to the who and what of your current character. I mean you don't want to reveal to her that you spend your time running around with a big muscular Nord type - she may get the wrong idea. Also, any type of elf is, well, not such a good idea, we'll leave it at that. Furry Khajiit, no, you do not want to go there. You may be okay with an Argonian.
Probably best if she plays. And what an ideal way getting to know someone.
Character creation is full of possible interpretations of someone's psyche: Which race do they choose, stature, tattoos, scars, eye colour... This could take some time, be ready with drinks and snacks, a fully stocked refrigerator should be enough and a spare re-hydration kit may come in handy. Remember to restock the refrigerator before the first visit to a trader.
On to the game and the critical moment when you discover if she is satisfied using one hand or if she thinks having to use both hands somehow feels better. Also sharp, blunt and ranged, I'm sure the choice must mean something very important.
Freedom at last to stride though the mist across the virgin snow. A critter in the distance, does she:
1) Try to edge closer for a better look?
2) Ask if it's dangerous while running away with one of her real hands covering her real eyes?
3) Let lose a blood curdling yell at the top of her voice while charging forwards weapon in hand(s)?
4) Glance over her shoulder, and ask wide eyed, "Can animals be decapitated too?"
Such a massive game, so much fun to be had. Watch for all the signs and good luck.