Kat derives immense satisfaction from fisting me in the rear end. She exhibits a keen interest in gradually inserting her fingers, one by one, into me. She carefully explores every inch from within, searching for traces. As she begins to work her fist into my backside, I am overwhelmed with ecstasy. I can barely withstand it, climaxing repeatedly. Kat observes with interest and smiles, watching the entire spectacle unfold.