Office footjob tease no cum allowed! Wicked bad tease and denial with my feet

I really really REALLY REALLY like to tease guys especially when they are vocal and respond well to the way I am making them feel. On this day I was sitting with my friend in the office and I knew he had a sexy plans later so he was not allowed to cum now or he would fuck that up. And thats the best when I make a guy want to cum but he cant or shouldnt cause I can really sense the frustration! He was so miserable when I stopped but he didn't wanna take any chances and I edged him really close quite a few times!