Sachi notices something going on between Erika and Nagi and decides to try to get to the bottom of it. Both she and Nagi are on the verge of a big decision.
So you don't know if you 
should ask her or not, huh?
لا تعرف إن كان يجدر بك سؤالها أم لا؟
Y no sabes si deberías preguntarle, ¿no?
Que si deberías preguntarle, ¿no?
Quindi non sai se dovresti chiederglielo o meno, eh?
Então você não sabe se pergunta ou não...
И ты не знаешь,
спрашивать или нет? Ясно.