While I've been balancing up here on my fence all along, I, like Eyes4crime, could be easily convinced of guilt, if some evidence comes along. I just have not seen any yet.
I know some people, including my dear departed little sister, who would probably come off just as Terri is doing, in this same situation. She (my sister) had a lot of emotional issues, some substance abuse issues, possibly a personality disorder, defintely inapropriate responses, and yet she would have done whatever a lawyer told her to do, as far as not speaking, taking his advice, etc. So I tend to give Terri the benefit of the doubt about outward appearances, meaning what we see.
And Terri really does seem to have been pretty much where she claims for the intial, crucial period.
I may turn out to be vastly naive, but I am not seeing the Terri/Dede relationship as anything more than a normal friendship. And I can totally imagine how Terri may have said to the landscaper, "my husband is so mean, so whatever, I wish he was dead. Can you help me?" And if he balked, that was the end of it. I have my doubts whether anything other than maybe unspoken promises of a sexual relationship ever came into it. Or that a "plan" ever exsisted.
Just my opinion, of course.