YOU SAID:
What is this sis doing here, I wanted her at the party with my friends.
INTO JAPANESE
このお姉さんはここで何をしているのですか、友達とのパーティーに彼女を呼んでほしかったのです。
BACK INTO ENGLISH
What is this sister doing here, I wanted you to invite her to a party with your friends.
INTO JAPANESE
この妹はここで何をしているのですか、友達とのパーティーに彼女を招待してほしいと思いました。
BACK INTO ENGLISH
What is this sister doing here, I wanted you to invite her to a party with your friends.
Okay, I get it, you like Translation Party.