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.
I know you don't have a choice 
about going to Europe.
Ich weiß, dass du bezüglich deines 
Umzugs nach Europa keine Wahl hast.
Sé que no tienes otra 
opción que ir a Europa.
Sé que no tienes más 
opción que irte a Europa.
Tu n’as pas d’autre choix 
que d’aller en Europe.
Sei que você não tem escolha
quanto a ir para a Europa.