WHOA! Not all you are saying is true. Nowhere can you find scripture to back up the comment about being married in the eyes of God just because they have a child. God does give reason for divorce in the Bible. We do not know if they met that requirement.
I can show you the verses that back up my point, however if I were to show you them, would you conceed that from a biblical standpoint, if there is a marital dispute between the husband and the wife about where the child will go to school, that according to the Bible, God has placed the authority for the final decision on that matter with the husband?
If you are not willing to conceed that point during a marriage, then those Bible verses would certainly not be of any value in a case where the husband and wife have obtained a Civil declaration of divorce.
God does give reason for divorce in the Bible. We do not know if they met that requirement.
Well the "biblical" excuse for divorce is "adultery", isn't that true?
What was the biblical punishment for adultery?