Beautiful lady Suzanne: Fifty strokes

Do you wanna jerk off and cum for me? Do you wanna stroke fast for several minutes until you explode for you Mistress? Not today. You have exactly only 50 strokes to cum and I will count it for you. You can’t cum on 48 or 49, you have to cum exactly on 50. You have to learn some discipline and self control! Ready?;)