So basically, instead of opting for kids, Femdeavour did not give up immediately after becoming Number 2.

Then like canon, she decides that her current "do your best at becoming a hero" strat won't work, and instead she decides "I'm gonna distract him with my everything" and decides to aggressively flirt with All Might in her free time, having the external appearance of the kouhai that looks up to her senpai whilst internally she's going "Haha! With my insert lewd tactics and my not for the ears of children along with the method of nothandholding>:(, he'll be wrapped around my pinky before long!"

What she did not expect was for All Might to immediately adapt like Mahoraga. Not much female interaction pre-UA to getting all of it as he became buff left him with both desire and experience with flirting. And so Femdeavour's plan took an unexpected turn as All Might throws it back at her, and the most funniest part is that she's completely new at this since all the boys were too intimidated by her to bother asking, and so she blushes at All Might's flirty remark back, takes a step back, and continues on her battle of tongues. (Not in that way.)

And so began their epic journey on who can rizz the other one harder in the quest to become Number 1.