YOU SAID:
We will have a relationships with each other
INTO JAPANESE
私達は互いに関係を持ちます
BACK INTO ENGLISH
We have a relationship with each other
INTO JAPANESE
私達は互いに関係がある
BACK INTO ENGLISH
We are related to each other
INTO JAPANESE
私達は互いに関係があります
BACK INTO ENGLISH
We are related to each other
That didn't even make that much sense in English.