Here's possible theory and/or theories, thoughts, opinions etc. that have come to mind. I am not in no way placing blame on anyone or accusing anyone of anything. We know HE had a date that night - maybe she went on the date because she was moving on, maybe she went on the date to make SM jealous...we don't know. Maybe HE didn't tell him she was going on a date and SM, or TM AND SM saw her out and about with her date that evening. However, either one of these scenarios could've very well upset SM. HE may have been tired of playing his game and she could very well have given him an ultimatum...me OR her (TM)...we don't know. Maybe SM (or SM AND TM) and stalked HE that night and watched for her to get home, to see who dropped her off, and what time she got home, etc., especially since it seems, as far as we know, that the phone contact started after she returned home from her date.
Next scenario that may be combined with or separate from the above: SM and TM may have had a major blow-up at their home. It may have gotten to the point where she told him to get out or maybe he left. More than likely, she would've taken all the keys to the vehicles (and possibly the golf cart too) and could've very well taken his cell phone as well. So he leaves on foot and goes to pay phone to call HE and asks her to come pick him up. They don't want to go to her apartment because they know that TM knows where HE lives so they go to PTL. TM is texting and/or calling HE from SM's phone, knowing it will place blame on him as the calls and/or texts are from HIS phone. TM goes looking for him and finds them together and she goes into a fit of rage and kills HE in the process and SM knows he has to help TM then, otherwise he loses it all and fears he will be blamed for what has happened. Or maybe he felt guilty over what just transpired so he feels it's his obligation to try and help cover things up. (As sick as that sounds).
There are a couple of things that I do feel strongly about. I do NOT for one minute believe that SM had any intention of leaving his wife. That was his bread and butter. Plus, IMO, he is a spineless *&$%ARD.
Also, I do think the contact between HE's phone and TM/SM's phone(s) was controlled by TM that night, as she was smart enough to plan it that way so the focus would be on him, and not herself.
However, none of this is reason for anyone to lose their life, regardless of their ages, their marital status, their occupation, etc...
We will all continue to pray for Heather and her family and friends and pray that justice will be served on those responsible!