Haruki hears about Kazusa's moving from her mother, who she hadn't been on good terms with.  He feels betrayed and angrily confronts her.  But his words force open the door to Kazusa's heart, which she had desperately tried to keep closed so that the three of them could stay together.
Let's discuss this when 
we've cooled off a bit.
Diskutieren wir darüber,
wenn wir uns beruhigt haben.
Dejémoslo para cuando 
estemos más tranquilos.
Dejémoslo para cuando 
estemos más tranquilos.
Je préfère en discuter 
plus tard, au calme.
Então vamos contar quando
estivermos de cabeça fria.