Anabelle was clearly aware of the lack of love on Love Day.
She finally had had enough of this situation she was in with Barone.
She got up really really early and woke others up too.
Duchess was still sick and having a headache but it wasn't an issue for Anabelle.
She went all in and had a big argument with Duchess about Barone.
Duchess fired back cause it wasn't her fault Barone had a thing with her too, she thought.
Duchess was livid. And wasn't willing to give up Barone just yet.

Anabelle moved onto Barone. Arguing about parenting.
He was never into the pregnancy or Shyer after he was born.
Anabelle went onto critisizing his woohoo techniques. Mostly cause he was just doing it and not building anything else aorund it much. Barone was getting increasingly angry while Anabelle herself was loving it all, be it cause of her mean personality or cause she was fully standing up for her baby and herself.
As the parents were arguing little Shyer had woken up. Anabelle was too busy at the moment to take care of him and Barone didn't really seem to care at all. Duchess came in for that.

Anabelle was on a roll at this point and did what had to be done.
He was shattered though.

Anabelle...
Somehow Barone earned good reputation out of this fight and break up.
He was the one who orchestarted this whole thing and probably playing the victim in this earned him this. Or since it happened in front of Duchess maybe she thought it was a good thing to happen and applied this goodness rather on Barone than Anabelle.

Anabelle took the baby and left the apartment! She moved into another aparetment in the same neighbourhood.

So now it's just Barone and Duchess. Seemed like a good place for those two. But Barone was quite shaken by the break up and even wanted to get engaged to Anabelle after everything.