YOU SAID:
I lost my virginity to my fathers boyfriends sister
INTO JAPANESE
私は父のボーイフレンドの妹に処女を失いました
BACK INTO ENGLISH
I lost my virgin to my father's boyfriend's sister
INTO JAPANESE
私は父のボーイフレンドの妹に処女を失いました
BACK INTO ENGLISH
I lost my virgin to my father's boyfriend's sister
That didn't even make that much sense in English.