http://abcnews.go.com/US/mother-missing-tennessee/story?id=14867155#.TtCBl3LZeuI
I just can't imagine KS's disappearance being an "inside job." Why would someone who loves those kids want to hurt someone they dearly love, knowing how heartbroken they would be? If it was premeditated, why go through with those plans knowing that the children were in the house? It also would have meant that the children - including a sick child - were in the house alone for the period of time that the body was disposed of. I'm not saying it's not possible...it's just that it would be terribly callous and selfish of a parent not to be concerned about his own children's safety, health, comfort and emotional well-being.
Men that are violent towards their wives, or murder their wives, never make any sense to other people, yet it happens all the time. I think you make a good point ... the husband wouldn't be away from home for very long with the children in the house.