Flashback to a few months before Ai was born.     

     Fuck.
    Zoë crawled out of her bed, and saw the bright red stain ruining her sheets. Her pajamas were ruined, and she genuinely had no idea what to do.
    "Zoë?" Bakugo called, knocking on her door. "Are you awake? What's going on?"
     Zoë sword under her breath.
    "U-Um...yeah, everything's fine..." she yelled back.
     "Alright, well I brought you some breakfast!" The ash-blonde opened her door, and Zoë raced to her bed, quickly pulling the comforters up to her hips.
     "T-Thanks, Dad," she stuttered.
     "Kiddo, something's obviously bothering you, what's up?"
      Just then, Zoë realized that some of the blood had stained her comforter, and was VERY visible to anyone standing in her room. Bakugo just cocked his head, confused.
      "Why the hell is there so much blood on your bed?" He asked. Zoe's face heated up.
       Is he really that oblivious?!
      "U-Uh, well, um..."
      Just then, realization dawned on his face as his eyes widened. He quickly got off of the bed, and started backing away towards the door. Zoë took this to mean that he was repulsed by her with something she couldn't control, and she burst into tears.
      Bakugo literally ran out of the room, only causing Zoë to cry louder.
     "IZUKU!" He whispered-screamed, shaking his husband awake. "IZUKU!"
     "W-Whats up?" Izuku yawned. "Is everything okay? I was trying to sleep in..."
     "Everything is NOT okay!" Bakugo hissed. "Zoë...Zoe's bed is COVERED in blood, and she won't stop crying! I don't know what the fuck to do!"
       Izuku pinched the bridge of his nose.
       "Katsuki, what the hell?! What did you do?!"
      "I didn't know how to respond to it, so I ran out of the room! And then she just started crying!" He yelled.
       "Do you understand how she probably took that?! She probably thinks that you find her disgusting!"
       "H-Huh?!"
       "By running away, you're telling her, 'even as your dad, this is too gross for me to handle- you're on your own.' Great fucking job Katsuki!"
          "I- how was I supposed to know that?!" He yelled. Izuku pointed to his nightstand.
      "I got you those parenting books over a year ago! I should've know you wouldn't have read them!"
       Another loud sob came from down the hallway, and Izuku glared at his husband.
     "Stay here, and don't move." He hissed. Izuku got out of bed, and slammed the door behind him.
       Bakugo shuddered.
       How did I not see this coming?

     "Zoë, is it okay if I come in?" Izuku asked gently.
      "NO!" The girl screamed. Izuku sighed. He opened the door gently.
      "I'm sorry love, but we need to talk. Dad told me what was going on."
       Zoë buried her face in her pillow, utterly mortified.
       "What can I help you with?" Izuku asked gently, sitting next to her, and stroking her hair.
       "You're...you're gonna stain your clothes!" Zoë whispered, trying to push Izuku away from her.
      "Love, I don't care. It doesn't matter. Listen, you did nothing wrong- this is natural! It was bound to happen sooner or later, alright?"
       "My sheets and my comforters AND my favorite pajamas are ruined!" She cried. Izuku
shushed her.
      "Honey, we'll get you new ones. It's not a big deal at ALL. You couldn't help it! I'm not mad, okay? Do you understand?"
        Zoë, still bright red,'nodded her head softly. Izuku sighed.
      "You know, I've always felt bad that you don't have a mother you can go to for this stuff," he whispered. "I'm sorry I couldn't provide that for you."
       "It's okay Papa," Zoë sniffled. "I love you and Dad very much, so it's fine. It's just...I'm so embarrassed!" She cried, once again hiding under her comforters.
        Izuku ruffled her hair.
       "I'm going to run to the CVS down the street and get you everything you need, okay? Sound like a plan?"
        Zoë agreed, and Izuku stood up.
       "Tell you what, if you've never thought about this before, I'll call Ochaco to come over, if you want," he said, giving her a smile. Zoë, still bright red, nodded her head, and Izuku kissed her on the head. "I'll be back in twenty."
         Zoë got up and locked her door behind him. She didn't want Bakugo, who was obviously disgusted by her, to have to deal with her.

     "Ochaco, how did Tenya react when Sakura got her first period?" Izuku sighed over the phone.
      "Ooooooh, so THAT'S why you called me," Uraraka whispered. "Well, he didn't know what to do at first, but he tried to make sure she was comfortable, even if it was super embarrassing for her. I definitely took the lead on that one. Why? I'm assuming Zoë..."
       "Yeah," Izuku sighed. "And Katsuki found out before I did.
        "Well, fuck," Ochaco responded. Izuku agreed.
        "He literally ran out of her room without saying anything, and she burst into tears. I don't know what I expected, honestly. I swear to God, I'm going to murder him."
        "Honestly, he deserves it. She probably feels horrible about herself. I guess it would be hard with two dads- do you want me to come over?"
       "Yeah, that's be great. I'm pulling into the CVS parking lot right now to grab stuff for her."
      "Make sure you get chocolate," Uraraka said. "Just trust me on this one. Oh, and a heating pad would be a good idea."
      "Thanks for the help," Izuku replied. "Feel free to head over to the house. I'll be back in ten."
      "Sounds good!"
      "I appreciate it, Ochaco."
       "No worries! Happy to help!"

      Ochaco knocked on Zoe's door.
     "Hey, it's me- mind if I come in?"
     Zoë unlocked the door quickly, and pulled her Aunt into the room.
      "THANK GOD," she said, falling back into her bed. "God, I'm MORTIFIED!"
       Ochaco chuckled. "I feel ya, girl. I hope you don't mind your dad told me what was going on."
       Zoë shook her head.
      "I was hoping he would, actually."
      "I brought a few extra pads so you can change before Izuku gets home. Here."
      "You think of everything, Auntie!"
      "Now, I'm going to go find Bakugo and give him a piece of my mind," she smiled brightly.

AN: Hi guys! lol if you couldn't tell, this was TOTALLY a crack chapter- after writing the brief scene a few chapters ago, I couldn't get over how amusing it was to me to think about Bakugo reacting to girl stuff, and I couldn't resist writing this. Also, I have an aunt like Ochaco, and I don't know what I would do without her. This is just another one of my horrible head canons, but I hope you found it at least a little funny. (It's midnight and I'm so tired.)
A real chapter will be out later this week- I'll see you guys then! Bye! 🌸