Meeting Their Mother

Izuku could only watch in naked terror at the forming train wreck in front of him. His mother was still smiling warmly, but he could tell she was a moment away from freaking out. 'There is no way she could be this calm. She has to be about to freak out, mom always freak out,' Izuku thought fretfully to himself.

The reason Izuku was one-dropped-pin away from wet pants was the meeting taking place in front of him. His mother, angel that she was, had noticed that Izuku was much happier than he used to be. Granted, getting into UA and the introduction of Kiri into his life was a major ray of sunshine in his cloudy life, but Izuku's confidence had sky-rocketed lately. He stood straighter than he ever had before, he greeted her with a radiant smile, and he carried Kiri on his shoulder like a champion, the girl squealing in delight.

Any who…

Inko knew from her own days as a teenager that Izuku had found someone!

... and that the relationship was already rather physical by the looks of things.

Deciding to get more involved in her son's life she confronted him about it and insisted that she get to meet her future daughter in law. She had to browbeat the poor boy a little, but she was his mother, and it was time she got more involved in his life.

So here they were, Mandalay sitting at the dinner table across from Inko. How Izuku ended up inviting her was a stressful haze that made Izuku sweat, cry and stress-gag trying to recall it.

Mandalay, for her part, seemed slightly embarrassed to be meeting her boyfriend's mother. She smiled politely and chatted amiably with Inko, but her blush proved she was mortified to meet Izuku's mother in such circumstances.

So here they were, the ousted couple sitting side by side across from a surprisingly supportive mother.

The fact that a cute semi-imaginary vigilante was snuggled into her lap and asking for more sweets was probably a contributing factor to Inko's continued calm.

The little girl didn't know it, but currently her greatest power was acting as the 'still-my-baby' reality anchor that stopped Inko's universe from collapsing into a singularity focused around the fact that her son had an adult heroine as a girlfriend/ friend-with-benefits.

Izuku knew how tenuous the situation truly was however, as should Kiri so much as leave the table for a fork, Inko's mind could break and she would then proceed to cry, faint, threaten Mandalay's breasts with a garlic press, and/or the absolute worst case scenario: ask when she could expect grandbabies.

(AN: There is no cohesive way to continue from that last statement so here is a timeskip to after dinner.)

"Okaa-san, can I have some more yukimi daifuku pleeease?" Kiri asked in a sweet a voice she could while maintaining monotone.

"Snrk!/Oh Kami," were the respective responses of an amused Mandalay and a mortified Izuku, a certain memory coming to mind.

'Thank Kami, it's almost over,' was the only thing that Izuku could think at this point. Dinner was over and his mom seemed to like Mandalay, whom Izuku had walked to the door like a gentleman. Mandalay decided to throw Izuku a bone and placed a tender kiss on his cheek.

Izuku really wished he hadn't instinctively pecked her on the lips in turn.

He threatened to catch fire when his mother cooed at the display. He was almost out the door to walk Mandalay home when super-powered smol-bean spoke up.

"Ms. Mandalay? I just thought of something," Kiri gained the attention of everyone else in the room. She was unusually bashful, like when she was with her onii-chan.

"Yes, Kiri?" Mandalay answered. She knew a little about the odd circumstances of Kiri's 'birth' and was relieved the little cutie was as young as she looked.

Kiri fiddled with her hands, refusing to look up at the older woman"If- If you marry onii-chan, can I... Can I call you Onee-chan? Pleeease~?"

…

Mandalay and Inko's eyes morphed into pink hearts.

"Izuku marry me/her when you graduate!"

'Kiri-chan, you have betrayed me. You don't know it, but you have.'

"Well, what happened after that?!" A thoroughly interested Pixiebob inquired. She leaned forward like a child staring at a jar of fireflies. Ragdoll nodded furiously in agreement, while Tiger sat silently trying not to show his interest.

Mandalay continued to pet the head nestled into her lap. Her Kiri-imouto needed her rest.

"Oh, Izuku tried to commit seppuku with a lemon reamer."