Throughout Marie's rants and bouts of indignation and condemnation of her sister and Walt, nobody has reminded her that it was her little shoplifting hobby that almost got Skyler arrested. Hank also had to use a little leverage to clean up that situation, so his hands aren't perfectly clean, either.
When it comes to crime, Marie had her career long before Walt started his.
I think at this point, the real issue is who is going to end up with all the money. Since bad things are going to happen to Walt no matter how it plays out, and he is the only one who knows the significance of the numbers on the lottery ticket at this point.
I wouldn't put it past Saul to have Huell to put a tracking device in one of the barrels since we know he is more than willing to do more than just bodyguard and intimidation work for Saul. Pickpocket and possible accessory to poisoning., as two examples. Heuell probably got to take a little off the top for himself when loading the barrels as compensation, and even Walt's "mostly here" response to Saul's question about it being "all there" shows even he knows about the short count.