'They were your age then. They'd be your age now.'
This doesn't fit the chronology at all. The boys who died were at least around 6 or 7. Adam found his father dead when he was 10. His father killed himself after Sam was convicted, which was 12 years after the deaths of the boys. This makes Adam a good 8 years younger (at least) than the boys were.
If he was as old as she suggests, he'd have known his grandfather.
"I'll book you. I'll book you on something. I'll find something in the book to book you on."