Delta Zeta/Eastern Star----debate????

Sorry to crash on you all but i have a debate going on with a friend of mine .... you see we both belong to the Order of the Eastern Star (masonic group) and are both in different sororities...Over lunch one day we were discussing sorority histories and i told her i once heard that DZ was once an off shoot of OES and she doesn't agree. When i say offshoot they were in some way related to one another MANY MANY MANY years ago in the very beginning. So before i get shot out of the water on this and have to pay for lunch next time can someone please inform me if this is true or not.