I was always interested in why Mrs. Morgan let Harry monopolize Dexter, and why she neglected Deborah. What do Dexter and Deb think of Mom? What do they say about her as they work through the issues of how they got to where they are? And why aren't you people commenting at all on this?
Doris Morgan has been pretty much a non-entity since the beginning of the series (the fact that I had to look up her first name says a lot). We know she died of cancer when Deb was sixteen, but since Dexter is ten years older than his sister, Doris must have been a part of his early adult life. It's sort of surprising, in retrospect, that the show didn't explore Dexter's relationship with his adopted mom a bit more.