YOU SAID:

But the kid is not my son

INTO JAPANESE

でもその子は私の息子じゃない

BACK INTO ENGLISH

But he's not my son

INTO JAPANESE

しかし、彼は私の息子ではありません

BACK INTO ENGLISH

but he is not my son

INTO JAPANESE

しかし、彼は私の息子ではありません

BACK INTO ENGLISH

but he is not my son