Cum Now Or Never

Horny again, chastity boy? For half an eternity you werent allowed to jerk off, to touch your little loser dick. Whether I feel sorry for you? Forget it. I dont! But today Im gracious. I will allow let you to wank. But you have only one chance to cum. And I dont tell you when this will be. I set a timer, but I dont tell you how many minutes and seconds you get. You must cum at my command when you hear the signal. Use this chance, my little wanking-puppet! Cum now or never!