1) Shock and Denial
This is shocking news, no two ways about it. You always thought girl gamers were a myth, like beating Tetris or regular hygiene. It's only natural to have difficulty coping. Take deep breaths and try to focus on the game if you can. Things may spiral out of control. You may say things like "you're just saying that to cover up your high pitched pre-pubescent voice- or "No girls play video games.- You'll try to ignore it but she'll insist that she's female, bringing out
Now you've processed it, but you're still a little confused. And that makes you frustrated. And when that affects your kill-spread? Now you're angry. You can't deal with it; you may lash out, demanding she make you a sandwich. It's normal to start swearing, just like you always do, really. The game becomes a battleground for your anger. You may use your headset, for evil, as opposed to good (mocking n00bz). You'll keep dropping in headshots and teabagging her corpse. That's what she gets! You're not psychotic; it's only virtual!