This is what I was going to say. Alumnae don't have to come from that chapter in order to be supportive. If they did, we would never have new greek systems or new colonies. It happens all the time, in fact!
Exactly! And Indiana is a state with other schools that have strong Greek systems (Purdue and DePauw come to mind...) as well as the headquarters of several sororities.
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"...we realized somehow that we weren't going to college just for ourselves, but for all of the girls who would follow after us..." Bettie Locke