I wish SM had someone on his side who could read him some posts here, ones asking for him to be a man for once. He started this, in whatever way he and Heather became involved, and he can end it by revealing what happened and if it is possible, to help located her body for burial. Maybe if he knew that some people feel he was "dominated" or "bullied" (even if not true) he could see his way to confessing and going for the sympathy angle. Does he have anyone close to him? I am thinking of how Mark Hackings' brothers were the ones to get a confession regarding the murder of his wife, Lori.
As of right now, before any more info comes out, in some way, TM seems the more monstrous of the two, to many, while he appears as a weak, bumbling and submissive fool (hey, women get off or get reduced sentences for "being afraid" of the man, it should work in reverse).
Now is the time, Sidney...you are the reason Heather is dead, whether or not you killed her, or your wife killed her, or you both did. But someone will come off as the "worst" one, IMO. May as well let it be TM, if it was her idea. She does not care if Heather is found but maybe you do.
JMO