Too many questions

  Me: Could you buy me some food on your way back home?
Sis: Nobody cooked for dinner?
 Me: They did, but there's only little left.
Sis: Did they ate already?
 Me: I don't know if they already ate.
Sis: How much was left?
 Me: Not enough for one person.
Sis: Did they cooked some rice?
 Me: Yes.
Sis: Cook some food yourself. Or do you still want me to buy?
 Me: Ahrrg. Nevermind.
Sis: Have it your way.