You can't help yourself, reaching out to spread the cheeks of your mother's childlike boyish ass. That tight, freshly virgin hole winking at you, begging for stimulation. You shudder, leaning in, pressing your tongue into his hole. He let out a high pitched moan, his own thoughts wishing you had a longer, stronger tongue. A Fresh new change erupts in you, your tongue elongating, the muscle that used to only be able to extend half an inch out of your mouth growing to a good few inches. But you either didn't notice or didn't care as you practically lifted the child into the air, your tongue digging deep into his ass. It was like heaven for the both of you, and honestly, you kind of hopes his ass would get bigger. Your wish was granted, the plump ass on either sides of your cheeks getting thicker, rounder, more juicy for a seven year old. At the moment you couldn't hold back any longer. You pull your tongue out, set the boy down, the pull him back. You aim your cock quickly, and as the boy stumbled back, you penetrated his newly virgin hole in one go. His momentum sank him back all of the way on your cock, hilting you inside of him.