YOU SAID:
I love your sisters best friends brothers mom
INTO JAPANESE
私はあなたの姉妹の親友兄弟のママを愛しています
BACK INTO ENGLISH
I love your sister's best friend siblings mom
INTO JAPANESE
私はあなたの妹の親友の兄弟のママが大好きです
BACK INTO ENGLISH
I love your sister's best friend siblings mom
That didn't even make that much sense in English.