YOU SAID:

I like my dad's dad's mum's husband's granddaughter

INTO JAPANESE

私は私の父の父の母の夫の孫娘が好きです

BACK INTO ENGLISH

I like my granddaughter of my father's mother's husband

INTO JAPANESE

私は私の父の母の夫の私の孫娘が好きです

BACK INTO ENGLISH

I like my granddaughter of my mother's husband of my father

INTO JAPANESE

私は私の父の私の母の夫の私の孫娘が好きです

BACK INTO ENGLISH

I like my granddaughter of my mother's husband of my father