YOU SAID:

Hey, what if me and N be at the party?

INTO JAPANESE

ねえ、私とNがパーティーに来たらどうなる？

BACK INTO ENGLISH

Hey, what happens if I and N come to a party?

INTO JAPANESE

ねえ、私とNがパーティーに来たらどうなりますか？

BACK INTO ENGLISH

Hey, what happens if I and N come to a party?