It doesn't matter how you get it. Your mouth is only for cum. You might get it from jerking off. You might get it from being milked. You might even get it from sucking cock. But no matter how you get it, you will ALWAYS eat it. Forget about wasting it in a tissue or blurting it into your wank sock. Forget about spitting it out or avoiding it completely. You will ALWAYS eat cum. You'll eat it because that is what Mistress wants you to do. It's good for your health, as you're about to learn. And you should be grateful that your Mistress is look out for your health.