"Does anything feel different?" you query the man, observing how he did not seem to be turning into another slobby lion. The Anthro-Slob Light took effect rather quickly when you used it on yourself and your father, and Luther had already grown a bit slobbier, seeming to be more comfortable in your slovenly home, but he was not as slobby as you deserved, and he was still a human.
"Not particularly? You're just as hot and ripe as ever, and I want to make out with you passionately, but you refuse to let your precious lion mouth be sullied by the tongue of a lesser, cleaner species."
Hmmmm, interesting. He was quite right, but you've kept him human because having loyal humans to your father, and now your, cause is useful. Luther was promised to you at birth, after his mother and father were turned into your father's right and left hand men. Your father told you not to turn him unless he truly earned it, and you gradually understood why more and more. Luther had covered for you in your day to day life, as you hit puberty and went from a fairly normal kid, if a lion, into a slobby pervert.
As you thought more about all the things Luther had done for you in this new world, you realized he didn't know about the Anthro Slob Light. You had a thought.
"Hey, Luther, can you keep an eye out while I talk to my father about something?"
He grinned back at you, a knowing glint in his eyes. Regardless of whether or not you had something serious to talk about, your best friend and servant knew that you couldn't keep your hands off your father.
Your father had picked up the Anthro-Slob Light, and was tinkering with it as it rested on his chest. You walked up, and asked if he had made any discoveries. You saw him go to start, but before long, your whiskers had navigated through the copious amounts of lion fat surrounding his gorgeous penis. You began blowing it as you had done hundreds of times before, going up and down in a rhythmic manner as he went from somewhat being able to continue tinkering to losing all control of his bodily functions, just releasing nonstop belches and farts. The symphony of sounds led you to letting out a fart so loud you heard Luther stumble, before shouting "Smelling good, boss!" from the other room, as you brought your father to completion once more. Another plus of lionhood was the noxious amounts of seed you produce now, stuck on his dick for a good minute as you slobbered up all of his seed.
After finishing, he revealed that he had managed to make the Anthro-Slob Light...