Jerking off at work into my friend's panties

She gave me a pair of her panties the other day while we were at another friend's house. This time I'm at work when we turn each other on so much I have to go in a bathroom stall and jerk off as quickly as I can. Picturing her on her knees with her mouth open and tongue out. Waiting like a good girl for my cum. And thankfully I had put her panties in my pocket just in case. She was very appreciative of the video.