YOU SAID:
Are you flirting with my sister
INTO JAPANESE
私の妹といちゃいちゃしてるの?
BACK INTO ENGLISH
Are you flirting with my sister?
INTO JAPANESE
私の妹といちゃいちゃしてるの?
BACK INTO ENGLISH
Are you flirting with my sister?
That didn't even make that much sense in English.