What can you tell in Act 2 about the relationship between John and Elizabeth Proctor?

In the beginning of Act 2, there is some obvious tension between John and Elizabeth.  They don't seem that warm with each other.  We of course find out later that this is because John had an affair with Abigail during Elizabeth's extended illness.  This is also of course why Elizabeth fired Abigail.

In this act we see John making an effort to please Elizabeth.  As the act starts, John tastes the dinner Elizabeth has cooking on the fire.  He adds salt to it, but then later tells her "It's well seasoned."  He talks about the crops and buying a heifer and asks "How would that please you?" Clearly, he wants to make Elizabeth happy.  But just as clear is the strain of their relationship.

Just a few pages later, John and Elizabeth argue.  Elizabeth wants John to go to Salem immediately and tell what he knows about Abigail.  In the same discussion she finds out that Proctor had been alone with Abigail.  She says, "Why then it is not as you told me."  John is immediately defensive and says "Woman.  I'll not have your suspicion anymore."    The argument continues and John expresses that he feels that Elizabeth will never forgive him.  He says, "You will not judge me more, Elizabeth."  They continue to argue until Mary Warren arrives.