Ninetales lay on her bed on her side, while her son was on his back with his head propped on her like a pillow. A Meowth sat between the little human's legs, kneeling his erection poking out and resting on the boy's diaper.

"It was real nice a you to invite me over to give your son a spin!" The Meowth said to Ninetales, tickling the boy and keeping him entertained. "I thought maybe you were done with this kinda stuff, ya know, since we all stopped the whole babysitting gig."

"I gave it an honest try, but over time the urge just became too overwhelming." Ninetales replied, gently brushing her son's face with the tip of one of her tails. "Me and my little one here got to have a little fun the other night, so I wanted to watch him play with others. I figured it had been awhile since you got to do this kind of thing, so I knew you'd be eager." She finished.

"Oooh, I've been keepin' my junk pretty wet." Meowth said with a grin. "But I'm still eager! Your son is pretty friggen cute!"

Ninetales looked at the Meowth with her crimson eyes. The feline had begun bobbing his cock up and down, lightly drumming the boy's diaper as it flopped.

"Oh, really? How have you been managing to keep up with your fun?" The mother questioned her guest.

"Well... you'd be surprised how many people leave their windows unlocked." Meowth replied. "Just last week I spent an entire night in the crib of a girl who musta just been a couple months old! Tightest little pooper I ever popped, and she didn't even fuss once."

"Impressive..." Ninetales said with her eyes widening with excitement. "I'd have really liked to see that..."

"You'da loved it!" The Meowth spoke excitedly. "But for now, you're gonna hafta settle with watchin' me rail your kiddo here. I think we should get started!"

Meowth slid his cock off the top of the human's diaper, bringing the tip to a hole that had been cleanly cut where the boy's anus was. The hole was taped around to prevent any fluff from coming out of the diaper and had a red heart crudely scribbled around it with marker. Within, the young child's passage was slick with lube the Meowth had applied.

"You can take the diaper off, you know..." Ninetales said, watching Meowth poke his penis into the makeshift love hole.

"Nah, it's alright... Kids tend to get real messy and besides, I love the little crotch cushions!" The cat type said, giving the human's diaper a few pats.

The tip of Meowth's erection found its mark inside the toddler's diaper, kissing the puckered and lubed up hole it concealed within.

"Awright kiddo, things are about to get real interestin' for ya!" Meowth said to the child, in an attempt to enthuse him for the ride.

Eager to get at it, Meowth spared the boy no slack and pushed his cock into the little human's anus in one go. The young boy was surprised but unharmed by the sudden feeling of being forced open. Savoring the tightness of the little hole, Meowth watched the human's expression. He then grabbed the boy by the legs, using them as handlebars as he began to thrust. A cock pushing in and out of him was a sensation the boy could barely fathom. He could only lay there, completely at the mercy of the pokemon's pacing.

The Ninetales sniffed at the air, which began to stink with the sex from Meowth and her son. Slick and sloppy smacking sounds filled the otherwise quiet room as Meowth quickly and eagerly humped away at the child. The boy's face was beet red and shrill moaning sounds escaped his heavily breathing mouth.

"They... always... make... the cutest sounds." Meowth said between breaths as he relentlessly fucked his friend's son.

Ninetales leaned down, licking the boy's face as her tail continued brushing the other cheek gently.

"There there, little one..." She spoke soothingly to the boy, as he stared off into space. "Shhh... Momma's here... Momma's got you..."

The human was overwhelmed with feelings his body wasn't quite ready for, but his mother's presence and words comforted him enough for Meowth to finish. Meowth pushed himself hilt-deep on final time and cried out as he felt his semen unload into the human's warm insides.

"Whew!" He said with relief. "I actually thought I was gonna run out of breath there, your boy took it like a real champ!" He finished, giving the exhausted human a few congratulatory belly rubs.

Ninetales gave her son a kiss before turning her attention to the Meowth.

"Looks like you really enjoyed it." She said to him, turning back to her son. "He looks pretty worn out, but I'm sure he enjoyed it as well."

"Oh, he was a real treat!" Meowth said happily. "Really, gimme a call any time. I'll come over and play with your boy any day of the week!" He added, watching the yellow fox change the boy into a regular diaper.

"I'm sure it won't be the last time you pay him a visit." Ninetales said, bringing one of her tails towards her mouth and giggling. "But for now I think it's time to tuck him in for the night. Come with me into the other room... we can talk about who I might bring over next..."

The fire-type put her son in bed properly, pulling a blanket over him.

"Goodnight, sweetie... Momma needs to go and see our friend off for the night." She spoke gently, kissing the sleepy human on the forehead.

"G'nite kiddo." Meowth also said quietly. "We're gonna play some more sometime, kay?"

The boy drifted off to sleep as the pair left the room, the door closing slowly behind them.