Unfaithfulness before marriage is grounds for the marriage to not be consummated.   

Our marriage to Christ Jesus will occur at His return.   Many have already died and sealed their relationship to Him.   Those of us who are still alive must remain faithful until death or His return.   

How do we remain faithful to Christ Jesus after we have been Born Again?   
   → we read and meditate on His Word
   → we pray in His Holy Spirit
   → we testify of His lordship
   → we minister His Grace to others
   → we reject every offer to be unfaithful

What do offers to be unfaithful look like?   
   → agreement with that which contradicts His Word
   → calling on any other god
   → worshipping any other god
   → allowing for any other god
   → refusing to identify with Him
   → refusing to testify of Him

Our Lord Jesus Christ honors His Word above His name.   

I will worship toward your holy temple, and praise your name for your lovingkindness and for your truth: for you have magnified your word above all your name. Psm 138:2 The Word of the Lord gives import to His name, Jesus, the Incarnate Word.      To be truly aligned with the Lord you must hear, believe, receive and do His Word ( He Be Re Do).     We do His word by allowing it to transform our hearts so that we speak and act according to His Word Joh 8:31.

This means that to be faithful to His name includes being faithful to His Word.   

Since the Holy Spirit is the Spirit Of Christ Jesus, by fellowshipping in the Prayer Language you are strengthening your relationship with Him.   

When testifying of His wonderful works and His amazing Grace to believers and unbelievers we are being obedient to Him.