YOU SAID:

I don't know if you know that your mother's stepsister is dating my uncle's brother-in-law's cousin twice removed

INTO JAPANESE

お母さんの義理のお姉さんがおじさんの義理のいとこと2度デートしていることを知っていますか？

BACK INTO ENGLISH

Do you know that your mother's sister-in-law is dating her uncle's cousin twice?

INTO JAPANESE

お母さんの義妹が叔父のいとこと二度デートしていることを知っていますか。

BACK INTO ENGLISH

Do you know that your mother's sister-in-law is dating her uncle's cousin twice?