Yeah basically it was because of the incident and how she broke up with him that comes back to haunt her! Getting her fired and blacklisted, big part was hoping to make a connection via MC! But yeah I expect her to start a fuss since it seems the Manga writer wants to "build up to her BSoD/Despair Event Horizon moment" much latter in the story! Specifically the "Monster Stampede Reito saves her from, where the CLIMAX of the "assface she chose and believed was the better choice" finally admitting at her LOWEST MOMENT he only cared for her because of her looks, blamed her COMPLETELY for why he got transferred in the first place and of course "cheating on her" when she's in the hospital after surviving a near death experience that left her scared "all because she felt like a LOAD" because he whined about her "spending money needlessly and being useless as a housewife!" It feels like that will be the CLIMAX of her suffering "the very fate she KNEW might have befallen Reito mixed with what she did to him, such as cheating on him behind her back and seeing herself as IN THE RIGHT FOR ALL SHE DID!" Assface did the SAME to her at her LOWEST MOMENT without a care how she felt! Made it funny when she was made aware after Shitface left that Reito left her a potion to heal the wound she got on her face. A kindness she KNOWS she long sense didn't deserve
It's why I think all her behavior especially this chapter is trying her best to absolve herself of her wrongs against Reito! Such as claiming he wasn't thinking of thier future, and basically ACKNOWLEDGING but denying that she left HIM to have to do everything all while she expected him to GUESS and was "keeping him at a distance" that she STILL THINKS he's "floundering and jobless" and that wasn't her fault despite the fact she KNOWS IT IS! It's why the firying and blacklisting was important! She was getting a TASTE to the very same thing she HELPED assface and the receptionist do to Reito, where what happened to him was unfair alongside her "infidility" which she knows is wrong, but is CONVINCING HERSELF "she deserved better" she brought it all on herself! Hell even what happened that led to the Monster Stampede incident that nearly killed her was another example of her "ignorance" at what Reito DOES! Once upon a time she and Reito met in school BECAUSE she heard he was a Adventurer and thought they were cool! She was whole fully ignorant and it was clear she only got close to him as an "oddity and whim" and hid her "distance" as "maturity" when it was just her "princess complex" making her act like she can never be wrong. It's why Assface's betrayel later and Reito's "last favor" as she KNOWS he saved her BECAUSE he was in the area on other business and would have saved her no matter WHO she was, she was someone in danger, he helped, even AFTER what she did he didn't hesitate to save her! That finally set in her ego now shattered that SHE was the one who never matured and was the one who was the FAILURE of the relationship, not him. I mean she KNEW what Assface was like, but like the Receptionist she FOOLED herself willfully that she was doing Reito a FAVOR by "shocking him with the mature adult world" to make him better himself or prove he was always unworthy of her like she thought to justify!"
It was a HARSH lesson she had to learn, I mean she almost got raped because she never factored "bad actors" would TARGET civilians using the "safe area" as "easy pickings" which added to her ignorance and navitiy of "the adult world" like she BELIEVED she knew! She knows she distance herself from Reito since day one, she KNOWS she should have talked to him, she KNOWS cheating on him and conspiring to cost him his job and playing it AS A FAVOR was all wrong! Yet like the Womanhchild she still was, she tried to deny, and deny despite reality PUNISHING her actions! It's why it's funny she told Assface here the call was nothing, cause if she did tell him, we know he'd DAMN WELL TELL HER TO GO AND APOLOGIZE TO REITO for HIS sake because he's yet to tell her he was PUNISHED for what he did....or that she was DATING the world's TOP FUCKING ADVENTURER! AKA someone who was actually HIGHER IN THE SOCIAL CASTE SYSTEM THEN HIMSELF! Meaning she traded Gold for Coal! The fact he told her nothing just as she did to him is the first major sign their relationship as predicted was doomed and she learned nothing! She expects her needs to be MET and says nothing more so you have to guess correctly!