Editor's note: this submission contains scenes of non-consensual or reluctant sexual situations.
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"Come on, Enrique, get out of bed! It's late!" Carlos shouted into his nephew's bedroom.
"I don't feel good, Uncle Carlos."
"If you think you can get away with this just because your parents are away, you're wrong," Carlos scolded Enrique. "Now get out of bed before you miss the bus!"
Enrique just whined and rolled over, pulling the covers over his head.
Carlos knew the eighteen year old boy was being lazy and stubborn. He couldn't deal with that right now. Angrily, he headed back into the kitchen to finish off lunches for all of his other nieces and nephews. Their parents were away for the week. Carlos, 28 years old and between jobs, had elected to babysit the five children. Enrique was the oldest, and that made Carlos angrier. His laziness set a bad example for his younger siblings.
After Carlos had seen Enrique's brothers and sisters off to school, he went back to the delinquent's room.
"I'm gonna take your temperature," he said, showing Enrique the thermometer. He also held a jar of lubrication.
Enrique opened his mouth and lifted his tongue as his uncle sat down on his bed.
"It's not that kind of thermometer," the man said. He yanked the covers off of his nephew's teenage body.
The cute kid threw his arms down in front of his lean body, embarrassed at his sudden exposure. "Uncle Carlos!"
The man was a bit surprised to see the eighteen year old wearing a cute little pair of briefs. The revealing, orange-striped undies seemed outside a normal teenage boy's sense of fashion, but Carlos wouldn't complain. They were pleasantly snug on his slender frame, and the man enjoyed the sight. A strip of Enrique's flat tummy was visible between the hem of his small T-shirt and the waistband of his briefs. What a sight.
But back to business. "Flip over," Carlos ordered.
"What? Why?" Enrique rebelliously questioned.
"I said I have to take your temperature. Do as I say or I'll drive you to school like you are. You want your whole school to see your cute undies?"
Blushing, Enrique rolled over onto his stomach. Carlos pushed the kid's legs apart and knelt between them, pulling up on Enrique's hips. The teenager's butt was now propped up and in position. Carlos peeled the colorful fabric down, taking the boy's nice, round cheeks into each hand. Opening up the fuzzy channel carved between his beautiful buns, Carlos spied the boy's tiny muscle right in the middle. There was a slight musk, which was to be expected after a night's sleep. Otherwise, Enrique seemed clean and tidy. He played a thumb over the teen pucker, lightly pressing on that secret button.
"What're you doing?" Enrique asked, just the tiniest hint of fear in his voice.
"You said you're sick. So I'm going to take your temperature. The old fashioned way." Carlos didn't intend his nephew to get away with his stunt without causing the kid some strife. He coated the little temperature device in lube and inserted it slowly into the boy. After a minute, he removed the device. The boy's temperature was perfect.
"Hmmm," Carlos hummed loudly, playing it up. As he stared down at that fine teenage ass, new ideas entered his mind.
"What?" Enrique asked, curiosity mixed with concern.
"I don't like what the thermometer says. I'm going to have to check it out myself. He spread a glob of lubed out onto Enrique's hole and began rubbing it with his thumb.
"Wh-what are you going to do?" the teen asked, worried. With his chest and shoulders pressed into the mattress, he couldn't see what his uncle was up to.
"I'm just going to check you out a little to make sure everything's okay." He circled around that tight anus a few more times and it actually puckered out a little. Enrique was reacting, flexing his little hole. Carlos pointed an index finger right at the teen's anus, pushing in ever so slightly with the tip.
"Push out," he instructed and Enrique obeyed. Carlos' fingertip eased inside the impossibly tight passage. He held it there for a moment, then continued. "Push out when you feel me pushing in. It'll open you up back here and make it easy for both of us."
Carlos felt the tightness wane and slowly moved more of his finger inside. Enrique would occasionally tense up and let out a small cry. Carlos would stop and let the boy adjust before pressing on.
"Almost there." Farther and farther in he pushed until the knuckles of his other fingers were mashing against Enrique's butt. He could hear the boy breathing heavily.
"Oh, yes, I can feel that you're really warm down here." Squirming his finger around made Enrique groan.
"Oooh, Uncle Carlos... what....what the hell..."
"Just relax," Carlos cooed. With his free hand, he shimmied Enrique's tight shorts down his thighs. The teenager's balls came into view and Carlos cupped them in his hand. He tenderly stroked his nephew's nuts while pulling back on his buried finger.
"Hooooohhh... How's it g-going?" Enrique stammered as his uncle massaged his sack and rotated the impaled digit. "Am I sick?" His rectal muscles clenched and relaxed around his uncle's finger.
"I'm going to have to take a closer look at your parts. I'm glad you stayed home today, buddy."
"Is there really anything wrong? Is it serious?"
"I'm not sure yet, but don't worry. I guarantee that when I'm done, you'll be feeling much better."
Once he had his finger free, Carlos lined up two digits and pushed his way back inside.
"Uuuunnnnfffffuuuck..." Enrique groaned, wiggling his cute little butt.