The more that's revealed, the more I think she was involved from the beginning, even if she didn't know it would involve murder.
This situation reminded me of a famous but now forgotten case in Houston when I was in junior high. A police lieutenant, the husband of a prominent school board member, was rushed to the hospital in a coma after he accidentally shot himself while cleaning his shotgun at home. Everyone had pity and admiration for his wife who kept a lonely vigil by his side day after day. After nine or ten days, a nurse came in after the wife had briefly left the room. The guy quickly opens his eyes and says "she shot me!" He had been out of the coma a couple of days, waiting for his chance. And suddenly the woman everyone had admired was led away in handcuffs.
Different kind of case, I know, but just goes to show that the "victim" may not be a victim.