I've been listening back over DdH's questioning and the conclusion that I've come to (based on the evidence, the way Casselden interviewed her and the questions he
didn't ask, her body language and answer patterns, my own experiences, and insights provided by others on the forum - thank you
@MrsEmmaPeel) is that the most we can say with a reasonable degree of
certainty is that she's lying for her husband.
We don't know why. We don't know whether she's trying not to implicate herself because she's actively involved. We don't know if he's threatened her. We don't know if her children have urged her to protect their father. We don't know if some of her answers are genuine lapses in memory (because dates are seriously not my gig either).
We can speculate, of course, but we can't say for
definite that she's involved.
From rewatching and running over scenarios in my own head, I do think she knew his activities were dodgy. She probably, to some degree or another, knew that he was up to his eyeballs in fraud. I think she
must have, but this is just my opinion. How much she knew, and to what extent she was involved, is up for debate. It would have been in RB's interests to have her know as little as possible, for both of their sakes. Whether she turned a blind eye to his dealings (which I'm not saying is acceptable, but is certainly not the equivalent of plotting a murder) or helped him in some capacity is unknown.
I
don't believe that she knew about the 'lonely hearts' cons, at least not what he was actually doing within their parameters. The only time she demonstrates real emotion in the inquest is when the subject of his affairs is brought up. This seemed genuine to me, amongst a sea of half-truths and wishy washy details. She may have known he was unfaithful, but I don't believe that she knew he was concocting relationship-style scenarios with these women and playing them out, swindler or not.
I may be wrong. There are still elements of the cases (especially Marion's) that make it seem like a woman, or at least an additional party, may have been involved, so who knows. I'm just not 100% convinced that DdH knows what happened to Marion, and we can't state as
fact that she's involved with his scams.