skyjedi2005 said:

How about Leia's real mother did not originally die and was in hiding.

This is what i put together reading the very small reference in the jedi novelization.

The original idea was probably she was one of the early leaders of the rebellion, was in hiding until palpatine found her when she went to visit her baby on alderaan at the organas and was arrested tried for treason and executed.

that's a fairly massive extrapolation from the information available, basically all we know is that she took leia to hide on alderan (Ben to luke "your mother took leia to live as the daughter of senator organa, on alderan") and died when leia was still very young.

Also Ben to Luke "When your father left he didn't know your mother was pregnant. Your mother and I knew he would find out eventually but we wanted to keep you both as safe as possible for as long as possible"

I had always assumed the mother remained in hidding with Leia and died of natural causes, if Anakin and the emperor didn't know about the babies and the mother disapeared and was hidden by the diplomatic immunity of the Organa family then they wouldn't be discovered until luke is revealed in Episode 4.

Obviously your version of events also fits teh available information but to say that was probably teh original intention is a pretty big stretch.