Keep Going

You straighten your fingers again, and walk backwards, moaning as more and more of your arm slides into your ass. You are panting heavily as your sphincter touches your elbow, and let out a roaring moan, your legs wanting to give out on you. You extend your fingers fully, and gasp as you stretch further. You sit there for a few minutes to get used to it, rock hard the entire time. You bite your lip, before making up your mind on your next thought. You slip the cock ring over your other arm, and press your hand against your asshole. You suddenly push in hard, crying out in pain as the size of your asshole almost doubles. You sit there for another painful five minutes, until you've mostly adjusted to the extra limb in you. Then, you brace-too impatient to go slowly-as you ram your left arm into your asshole, also up to the elbow. You let out a blood-curdling scream at the pain, the immense pleasure dwarfed by it.