We don't know where in her body Silvio shot her. We don't see that. TV has given us some bizarre plotlines (how about Bobby Ewing's dream); Ade's return would not even have to reach that threshhold.
I can see a teaser during the final seconds of one of the final episodes as the camera pans by a hospital intensive care unit where we see a blonde women lying in a bed hooked up to all kinds of tubes and machines. Is it Ade or isn't it?