Sakuya teases Nagi explaining that she is so bratty that she can't take care of young children. Furious, she asks Hayate to go out and find her kids to take care of.
Now, now, you are to address me 
as Dear Sister Nagi.
Vamos, tienen que llamarme Nagi-oneesama.
Por enquanto eu quero que vocês 
me chamem de Nagi onee-sama.