Explanation:

At one point in the book Frank forgets to empty out Laman's chamber pot and gets beaten by Laman. In response to this Frank leaves the house to go live with his uncle Ab Sheehan. While there his uncle has decided not to feed him, so Frank steals a loaf of bread to feed him and his siblings as, "if you commit one sin you might as well commit a few more because you get the same sentence in hell.