AOII does allow alumnae initiation. In most cases it is a friend or relative of an AOII who is active with a local chapter. We have initiated 3 alumnae initiates in my chapter over the years. All were mothers of AOII's who were serving as advisors or otherwise working with the local chapter.
This is not the only instance it occurs, but is one you will see more often. There are several AOII AI's on greek chat - each experience is different.
~ To address the other topic in your original thread: It is NOT ok to share AOII ritual information with anyone who is not an initiated member. This includes spouses, boyfriends, parents, children, friends, etc. Your fellow new member is very misinformed. Please share this with anyone else in your chapter that is under the impression that it was ok to do so.
and welcome to Greek Chat!