The problem with that is you have to be truthful to be forgiven first. How much of his current action (helping out around the house, rubbing her shoulders, going out with her more) are because of guilt more than being "freed from burden"? Things started changing for him after he cheated not before. So while he's doing great by her now, there's still a twinge of shame, a bit of dirt left behind by his actions. His actions will be tainted until SHE forgives him for what he did and she can't do that without all the information laid bare.