[AlphaSigOU]

The rules on a female wearing a fraternity member's badge vary between fraternities, but it is generally restricted only to the member's fiancee or wife, or sometimes to the mother or immediate female relatives of the member. In my fraternity, the only female member who can wear a member's badge is the wife or fiancee of a brother. At the brother's discretion, he may instead give a special 'sister pin' that may be worn by the female relatives of his family.

It's not seen as often as it was in the days of old, but it was common for fraternities to have a pinning ceremony whenever a member announced their engagement.

Also, it was not unusual for fraternity and sorority members, when they became married, to permanently join their badges together, something that is rarely, if ever done today.