YOU SAID:
Hi i am my moms child
INTO JAPANESE
こんにちは私は私のママの子です
BACK INTO ENGLISH
Hello I am a child of my mom
INTO JAPANESE
こんにちは私は私の母の子です
BACK INTO ENGLISH
Hi i am my mother's child
INTO JAPANESE
こんにちは、私の母の子です
BACK INTO ENGLISH
Hello, this is my mother's child
INTO JAPANESE
こんにちは、これは私の母の子です
BACK INTO ENGLISH
Hi this is my mother's child
INTO JAPANESE
こんにちは、これは私の母の子です
BACK INTO ENGLISH
Hi this is my mother's child
That didn't even make that much sense in English.