Girlfriend gives you the best sockjob ever

You've been waiting for her to come back from work for a while now and since she always makes you jerk off to her feet, she's in the mood to try something new today, just to spice things up a little...so she comes up with the idea of a naughty little sockjob. How about instead of you watching her tease and giving you jerk off instructions, she just strokes your cock with her feet instead and instruct you to cum all over her socks? I have a feeling that this is about to get really messy and kinky :) Will you be able to make it till 0 though or will you ruin her countdown?