YOU SAID:

Long long ago i discovered my dad was married to me ???

INTO JAPANESE

長い昔私は私の父が私に結婚していたことを発見???

BACK INTO ENGLISH

Long ago I discovered that my father was married to me ???

INTO JAPANESE

昔、私は父が私と結婚していたことを発見しましたか？

BACK INTO ENGLISH

In the past, did I discover that my father was married to me?

INTO JAPANESE

過去に、私は父が私と結婚していたことを発見しましたか？