Civil wedding as engagement?

My partner and I got married a couple of days ago, we had a simple civil ceremony in which we were legally and officially pronounced husband and wife. But a lot of our family says we're only engaged. They refer to me as their son's fiancè rather than wife. It really hurts my feelings and leaves me confused. They believe that the religious ceremony is the actual wedding (but we didn't want to do that). Why do people refer to the legal marriage as merely an engagement?

Civil wedding as engagement?
Post Opinion