In Breaking Bad season 4-5, people are told that Walt has won a lot of money in gambling and hence they have bought a Car Wash and clearly Walt doesn't need to work anymore. But the Car Wash is run by Skyler and everybody knows that because Marie has visited her several times there. How come nobody ever raises the question what Walt is doing? Where does he spend his days, doing what?
Isn't this unusual? Or is there an explanation offered in the episodes which I have missed?