Kali and Sikio by Brevis_art (https://www.furaffinity.net/user/brevisart), from my weight gain story Korongo: The Beginnings. The story follows a lioness, Kali, as she meets a mysterious (and chubby!) male lion who would like nothing more than to fatten her :3
Original submission: https://www.furaffinity.net/view/39673629/
My Full-sized FA submission: https://www.furaffinity.net/view/39676867
You can find Chapter 1 of Korongo here: https://www.furaffinity.net/view/36409417