You sit in wait, ready for your prey to arrive, ready to pounce. Finally, after what feels like an eternity in wait, you see the doorknob start to turn. You ready the flashlight, ready for your mate to arrive, but as it opens, it's someone else entirely.
"Son, are you there?" It was your dad it seemed. "Dad?" You ask, pausing briefly, "What are you doing here?"
For a man in his 50s, your father is still in pretty good shape, his black hair is starting to grey slightly, but he's muscular, fit, and spry, the exact opposite of your current self, and naturally still human, and a handsome one at that.
"Just stopping by for a visit, I was in the neighborhood and..." He sniffs the airs, his nose wrinkling in disgust, "...Ugh, what's that smell?" The burly, older man cringes as he opens the door, "And... why's it so dark in here?" He says as he flips on the light switch, and turns, only to see the massively obese slob lion staring back at him. His eyes widen in shock, unable to comprehend what he's seeing. "W-What the...?"
You frown, having expected a mate, but with the slob light...
"S-Son...?" Your father stammers, backing towards the door, only for you to raise the Anthro-Slob Light and flip it on him. Your father yells as the light hits him, and you watch, amazed as he begins to transform. "Don't worry dad, it'll all make sense soon enough." You try and comfort him as you can see the changes start to take effect.
Your father's once more muscular body starts to grow fatter, his clothes looking tight. The buttons on his plaid shirt being strained as you can see greyish-gold fur emerging from his hairy chest, growing considerably sizeable, doughier, like his swelling stomach, it isn't long before those struggling buttons start popping off, one-by-one, his widening rear and thighs, seeming to put him off-balance, tearing holes in his jeans. He grips the doorframe with pudgier, paw-like finger to steady himself as his breathing deepens, his biceps becoming massive rolls of blubber that stretch out and tear his sleeves. The greyish-gold fur starts growing along every inch of him, and you watch as it makes it's way up his face, a doughy double chin ballooning out, quickly obscure by a silvery mane.
He's becoming a lion, like you, a significantly older one at that you observe, as you can't help but grope your dick as you watch. You know you shouldn't jack off to your own father like this, but... fuck he makes a sexy lion, you know where you get your looks from.
You watch as your dad's features all become fatter, his face becoming a leonine muzzle, and while the bushy mane crawls up his face like a beard, it starts to trail off around the top of his head, making it appear that he's balding. Deep wrinkles appear on your father's blubbery face, making him look even older than he already is, but it adds to his charm. The final scraps of clothing rip off of his body as a tail finally emerges from his rear and swishes around, leaving him in a state not dissimilar to yourself, but much, MUCH fatter. He's a barely mobile blob now, and is desperately leaning on the door frame as he pants, utterly exhausted from even standing. You walk over and help him, "Dad, are you okay?" You say as you grab his arms, feeling the sweaty flab. He stinks for sure, almost as badly as you do.
He pants and wheezes, nodding, before finally unleashing a mighty thunderous belch and scratching his fat belly, "Like a million bucks..." He chuckles weakly, waddling inside your apartment, unleashing just as powerful a fart, further befouling the air, not that either of you mind. In his youth, he surely would've been as powerful a slobby beast king as you are now, but in his retirement he has certainly embraced the opportunity to become as fat and nasty as possible.
You help your father in as he leans forward, embracing and unexpectedly kissing you as well. It feels so natural though. As he removes his lips, drool trailing between your maws, he lets out another small belch, and another fart, the old gasbag can't help himself it seems. You help him waddle to the couch, which he sits his fat ass down on and, as it loudly protests, causes it to crumple underneath his enormous weight, not that he seems to mind, "Ya don't mind if I stay here a while, do ya lad?" He gasps, "The walk up here was a bit much for someone my age..." You smile, "Dad, you know you're welcome to stay in my pride whenever, you raised me to treat my elders with respect after all." You kiss him again, rubbing his soft gut. He chuckles as he reclines, another massive fart rumbling out. "I wish you had told me you were coming over though." You smirk as you continue rubbing the fat old lion's body.
"I wanted to surprise you, that's all, besides I didn't expect the journey to be as tiring as it was..." He laughs. "Well, you're barely mobile already. While you're here, you can stay as long as you like. Always feel free to ask me for anything." You affectionately nuzzle him and rub the fat lion's shoulders. "Mmmm, thanks so--URRRRRRRP--n" He belches once more, stinking up the room with his bad breath.