answer:First, read this article. It’s an interesting scholarly discussion of Sedley. link Second, although the book never explicitly says so, the implication is absolutely there – one day after a life insurance policy is purchased for Jos, he dies. That’s more than a little suspicious. A detective would look at it as motive and investigate the heck out of Becky. But the books doesn’t come right out and say that, and you are left with a whole lot of suspicion and no solid facts. My thinking has always been that she did it. (Sort of like OJ Simpson – he killed Nicole even though the evidence to prove it was equivocal).