I don't recall any mention of a conversation where Sheila and Colin discussed getting back together in Colin's book. Colin had a girlfriend called Heather at the time, it was mentioned that Sheila was romantically involved with Freddie (everywhere else but Colin's book mentioned that he was just a friend). Colin seems pretty convinced that though Sheila could behave erratically and violently any harm was done to herself, never to anyone else. That is why he was quick to believe she could have killed herself. However, when he was first told about the murders he assumed everyone had just been shot in their sleep. Like the rest of us Colin couldn't believe that she was skilled enough to hit the target so many times, nor could he believe for a moment that Sheila could have fought with Nevill and overpowered him. The angry letters from Jeremy published in the book are quite interesting. I think Jeremy couldn't bear the fact that Colin had become so calm and understanding about the murders, I think he wrote the letters to Colin to try to make Colin hate him. Interestingly enough, a letter from Bamber dated 1988 states that he had enough evidence together to challenge the conviction and he was adamant that he would be free soon. Nothing much changes, even 25 years on!