DISCLAIMER: I don't own anything from BNHA. Just OCs Edna and Eugeo, Izuku and Ochaco's kids.
Eri and Kota were looking embarrassed as the two teens sat on the edge of the bed. Eri's father, Izuku Midoriya (Hero Name: Deku), stared at them, arms crossed.
"So, did you two enjoy having sex?" he questioned them.
They were blushing. Eri had her arms over her chest and legs closed while Kota had his hands over his lap covering up his erection.
"Dad, I thought you weren't gonna be home for another two hours..."
"And you believe that while I and your mother were at work, and your brother and sister playing at Alice's home, you two can have fun with each other until then?" Izuku asks his adopted daughter, watching her squirm a bit.
Eri was indeed squirming. Her dad did catch them in the middle of their act when they were close to the peak.
"Yes?"
Izuku shook his head in disbelief. At least his daughter was honest... a trait that he taught her to have.
"Sweetie, we have much to discuss when mama gets home," Izuku said, before he looks to his number one fan. "Kota-kun, I'm going to inform Mandalay you'll be staying the night."
The two teenagers glanced at one another. They knew one hell of a talkin' was imminent...
"And Kota-kun, make sure you finish what you started, okay?" When the two stared at him in shock, he was leaving his daughter's room. He gave them a look. "A girl doesn't like to be left unsatisfied, after all. So, get to it."
He closed the door. The young father sighed softly, and proceeded to the kitchen.
Now I know why Aizawa calls certain kids problem children, he thought to himself. But telling a boy to finish plowing your daughter? What kind of dad says that? Ugh... fuck me, honey...
Back inside the room, Kota stared at Eri. "Did your dad just tell me to finish... plowing you?" The teen slowly moved his hands away from his lap.
She stared back. "I... think so?" Eri uncrossed her arms as she shifted her body to face her boyfriend.
Kota gently crawled on top his girlfriend, pinning her to her bed. He smiles to Eri. Eri smiles back. Their faces were close, eyes locked.
"We might as well do what your dad says, sweetie," Kota whispers.
She lets loose a breathy moan. "Yeah."
They start making out, and once again their hands roamed...
In the kitchen, Izuku was on his phone talking to Shino Sosaki (Hero Name: Mandalay).
"What?"
"Yeah. I caught your nephew with his dick inside my daughter," he informs the woman.
"Okay. Well, I was not expecting that, Izuku."
"That is why he is staying the night. When my wife gets home she'll talk to Eri and Kota will get a talk from me, okay?"
"Fine. I'll pick him up tomorrow. Don't scare him too much or I'll kill you."
"Love you too, Shino."
Hanging up after saying goodbye, Izuku is sipping the green tea goodness he brewed when the door opens. In walks his wife, Ochaco Midoriya (Hero Name: Uravity).
Izuku gave her a look. "I caught our daughter having sex with Kota-kun in her bedroom."
She sighs, closing the door and setting her purse on the kitchen counter. "Only a matter of time..." She then took five hundred yen from her husband.
"Never should have made that bet today," he mutters to himself.
"Sucker," she says teasingly. "So, are they finishing up?"
A weary sigh. "Sadly, I told them to finish up their business. Even though I did not want them to... what dad would tell a teen boy to finish fucking his daughter?"
Ochaco ignored the last bit.
"So, what will you say to the boy, hm?" she asks her husband, changing subject.
"I will demonstrate United States of Smash if Eri gets pregnant. What about you?"
Ochaco gave a moment of thought.
"I'll congratulate Kota on being the first fourteen year old to go to space," she finally answers.
Izuku has a spit-take moment with his tea.
"But that's only if their unknown hours of screwing each other ends with her bearing his child. But it's not like he'll reach the stratosphere. I'll let him return to earth when he grazes a Boeing 747."
He glared at his wife.
"Then why the hell did we go with your plan to allow them a last act if caught?"
"Simple. You'd scare him to death, Eri-chan will hate us, and Mandalay and the other cats would kill you for harming their nephew," she answers. "Now shut up and kiss me, honey. We officially have a teenage daughter."
Izuku couldn't argue with her. But the loving kisses soon led them to the living room sofa.
One hour later...
"Oh my god! What the fuck, mom and dad?"
Eri and Kota, now dressed, caught Izuku and Ochaco just as the adults enjoyed the bliss of post-coitus naked. The parents yelled in surprise from getting caught, falling off the sofa. Eri suddenly shouted in surprise whilst her face went full red: she caught a full glimpse of her dad's erection. Kota's face turns red from catching a hot view of his girlfriend's mom.
"Kota, stop staring," Eri snapped, swatting the blushing boy from continuing staring at her mom's flower.
Then the door opens and Eri's seven year old twin brother and sister Eugeo and Edna enter the house. The blond brother blinks at the scene before him. His twin sister gave a deadpan stare at the sight before returning to reading her light novel.
"Mom? Dad? Why are you naked?" their son would ask innocently.
Cue Seinfeld transition theme.