Faithfulness in a relationship is very important. I am amazed why some people are unable to stay with a spouse till death but decide to try uncharted waters. God want us to be faithful to Him as his children. We expect our children to be faithful to us all the time. We do not want our children to start cheating. When children start cheating on their parents, they are seen as bad children.
As parents, we want our wards to be committed to us and follow our instructions. We become worried when our instructions are disobeyed and flouted with no respect for us. Parents do not want their children to be cheats but their actions sometimes teach the children to be cheats. Our children observe what we do than what we say.
We have to stay faithful to our spouses. We said those vows in the presence of God and His witnesses and we must abide by those vows. God is faithful and He expects faithfulness from all His children. Faithfulness is expected in any relationship and we must make it a point to be counted when the faithful ones are called. God bless you.