Now I want you to stroke until precum is leaking out of your dick into your girls sweet panties. It must be so confusing why you can't just get satisfaction from fucking your girl. You need to humiliate yourself and think about her being pleased by other men. The thought of her in complete ecstasy with a stranger is such a turn on for you. Imagining him ripping away her cloths in front of you while you are forced to watch.
Keep stroking we want plenty of precum in those panties. Maybe your girl will see it dried in there later and ask you what you were doing with them.