YOU SAID:

My aunt's cousin is my cousin's aunt.

INTO JAPANESE

私の叔母のいとこは、私のいとこのおばさんです。

BACK INTO ENGLISH

My aunts cousin is my cousin's aunt.

INTO JAPANESE

私の叔母のいとこは、私のいとこのおばさんです。

BACK INTO ENGLISH

My aunts cousin is my cousin's aunt.