YOU SAID:
I want to introduce My cousin to You.
INTO JAPANESE
私のいとこをあなたに紹介したい。
BACK INTO ENGLISH
I want to introduce my cousin to you.
INTO JAPANESE
私はいとこをあなたに紹介したい。
BACK INTO ENGLISH
I want to introduce my cousin to you.
That didn't even make that much sense in English.