Don't ever...Ever...EVER ask for sex!!!
If she's not putting out, then find creative ways to instigate the sex. For example:
Let's say she's typing away on her laptop. Her hair is up and her eyes are focused on the screen. Walk up slowly behind her and BAM!! Smack the b*tch with a baseball bat.
:trouble:
Okay, don't do this.
Same scenario. Walk up slowly behind her and gently rub her shoulders. If she asks what you're doing don't say a word. Keep rubbing and smoothly move your hands up to the sides of her neck.
Caress her skin with your fingers as you massage her worries away. Tell her you're gonna take care of her. Then undo her hair and start kissing her neck. If she isn't turned on by this, stop everything you're doing and get your ass in bed with your laptop. If you don't have a laptop then pull yourself up in front of your desktop, open up some porn sites, and start masturbating. Make sure the volume is on.
If she asks what you're doing f*ckin' ignore her. Keep whacking away until you reach climax. After you're done, look over at her and say "Come here." If she refuses, then say "Oh well." If she does come to you, tell her to get on her knees and lick the *** off your stomach. Then let's say she starts heading towards giving you a BJ. Stop her and tell her you want to f*ck instead. Problem solved.
I know it sounds rather harsh but your girl needs to put out if she plans on having you in her life. Of course you don't have to have sex all the time, but 12 days without any action is absolutely ridiculous.
What I just described here is a great way to let her know that you always have other options. And nothing creates intimacy like competition. Even if the girls are digital ; )
Happy hunting.