What would have happened if the Son of God dishonored His Father?

It would be an impossibility because the Son of God is God Himself.

Another Consideration:

As the Son of God was fully a man and tempted in every way, had He sinned by breaking the 4th Command, He would have no longer been worthy to become the sacrifice for mankind - the perfect sin offering. There then would have only been one God Family member left to pay the price for sin - God the Father. But Jesus was filled with the Holy Spirit of God and past the temptations of Satan and this world, dying willingly for the sins of all mankind fully sinless and accepted by the Father so there is no need for what ifs.