God is the restorer and His timescale is different from ours. He prepares us to come back together, to heal and bring marriages back under His blessing. It is our listening to Him and the guidance of the Holy Spirit that will reap healing and restoration. Prayer is the foundation of all ministry, not only Counselling. We seek the Lord's guidance, He knows all our situations and where each person stands.
Forgiveness is a major key to healing.
If either party is not prepared to forgive, then the desired healing can be hindered. So does a critical spirit. Be open to the Spirit of God to guide you, be quick to listen and be wise in a slow, considered reply.