Work to gain the relationship skills to have a healthy MR. That includes clear communication, trust and forgiveness. It all takes time and work.
Why on earth would he even think of wanting to do that when she is sleeping with someone else? Good grief.
I dont think LITB is saying that now is the time to do that with his W. Its a time to learn these skills for the future so that IF they started piecing, things would be different in the future.
I dont think he needs his W to learn relationship and communication skills.