I appreciate your post outlining your theory of what happened and why, I don't agree, of course.
I take issue with describing CW as a caretaker, he was their father not some hapless friend SW coerced into babysitting their children.
'The lies and body disposals were from a panicked man'
I don't understand the compassion for him and excuses for what he did, he was a panicked man so he does what comes naturally? Discard his children in oil tanks and lie through his teeth?! If his story were true, he would have called 911 and try to save at least one life.
The public and the law come down hard on hit and run drivers but somehow here, CW's actions are understandable? The dead bodies he discarded were his own children and his wife!
CW was having an affair with a co-worker, he was living a double life and he was the one losing control, imo. Exposure was inevitable, he had two women to juggle, not an easy feat. One had to go, he chose SW and sadly, his children too!
And how do we know he didn't love the luxuries just as much as SW, or even more?!
Why didn't CW walk away, he didn't need permission from SW.
CW is an enigma at this stage but imo, everything will become much clearer when it comes to trial.