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.
and that's why ya still haven't 
grown outta bein' a kiddy.
así que seguramente por 
eso sigas siendo una niña.
e é por isso que você
 nunca deixou de ser uma.