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