Now I want you to further imagine that your girl is sitting down on a big cock while you are helplessly watching. That turns you on doesn't it sissy.
How do those panties taste loser? Haha Now I want you to stroke while you imagine the picture is you and your pretty girl. Once there is precum leaking out of your cock you should take the panties out of your mouth and wipe it off with the panties. Then as you guessed.. right back in your mouth.
Keep stroking and continue.