What is the significance of John's re-seasoning the soup?

At the beginning of this scene, the stage directions say
that John comes in, tastes the stew, then puts more salt in it.  I think that we see the
importance of this a bit later in the scene.  We see this when John compliments
Elizabeth on how well the stew is seasoned.  She blushes with
pleasure.

To me, what is going on here is that John is
making a real effort to try to patch up their marriage.  He feels guilty about his
affair and he wants to make Elizabeth happy whenever he can.  So, here, he makes sure
that the stew will taste the way he likes it so he can compliment
her.