[he drops his head, and takes a breath, preparing himself to speak his mind. It's never easy, and it's never fun, but it also seems completely necessary at this juncture.]
That is the problem, Brother. I was pulled in before you. You had not been replaced yet. Maybe it was important for me to be replaced first; I do not know her motivations.
Your copy died while trying to kill Rion, a very obvious crime by Sentience's standards. Why would her copy of you commit the crimes necessary to annihilate him?
[Cain sucks in his lower lip. He knows that the Pegasus Family program is much more adept in battle. He would never point this out directly.]
Rion and I are later programs-- since you never fought Rion, maybe you cannot know what he was capable of. Or it could have been an accident. Rita was impaled, and Rainheart was burned. Your corpse was battered terribly, the Steiner house was completely ruined. He killed Dr.Lem, too- who was made specifically to withstand us. Mother worked only to create more stable Programs after you, Brother.
[pause] And, I cannot formulate a pattern since there are only the two of us, but it may be reasonable to assume that I was going to die, too.