@Verifyveritas76 and
@rockfox I couldn't quote you both so I had to mention you. Here you go, why the woman in Deuteronomy 22:24 is not married.
The use of the word "woman" (translated wife) in verse 24 is admittedly problematic for me at first glance, but a quick look at a lexicon and the surrounding verses resolves the issues.
We have to start in verse 22 and read through verse 29. In this passage we see three different categories of female. We have the "mastered woman" of verse 22; the virgin, a betrothed damsel of verses 23-27 who is described in verse 24 as a "woman" and the unbetrothed damsel of verses 28-29. All three of them are treated differently.
The "mastered woman", what we think of as being married is a very simple case. There are no extenuating circumstances for her. If she is found laying with a man not her husband then they both die. It doesn't matter what the circumstances are.
The damsel that is a virgin and betrothed has some different rules. If she doesn't try to resist (I am simplifying the narrative obviously) then she is stoned, but her crime isn't listed as adultery. It simply sates that she is being stoned because she didn't cry out. And the man likewise is stoned but his transgression is listed as "humbling his neighbor's wife" (and this is where the female is described as the word that gets translated "wife" here but does not have the further description of being a mastered woman that we see in verse 22). It very specifically is not listed as adultery. Neither individual is listed as being guilty of adultery. Their crimes are very clearly identified as "she cried not" and "he hath humbled his neighbor's wife (woman, probably best translated female here)". There seems to be no actual adultery in this instance which would make it hard to describe the woman as having been "married".
Then there is the unbetrothed damsel. She is operating on yet a third set of rules. It doesn't really matter what the circumstances were in this instance, the female is described as being "humbled" (the same phrase used to describe what happened to the betrothed virgin) and she is now the man's wife. The sex in this case undeniably did form a "marriage" as the man is disallowed from ever divorcing a woman taken this way. Let me be clear, sex DEFINITELY DOES form a marriage, no matter what the intent was or if there was a covenant or not. This verse is iron clad. I don't know how anyone keeps arguing after this one.
So clearly the betrothed virgin has her foot in both worlds still. She is not yet a "mastered woman" (what we called married) as the female in verse 22, but she is obviously in a different category than the female in verses 28-29. I submit that she is not in a one flesh relationship nor is she mastered as is clearly shown by the differences between her and the mastered woman in verse 22. Therefore this passage does not support the idea of marriage formed separate from sex but rather seems to reinforce the idea, even a betrothed woman (who would presumably be under a covenant) isn't of the same status as a mastered woman who may have never been betrothed but could have been taken in the field against her will. This isn't even addressed. The betrothal or covenant (is this is indeed a sighting of that long sought creature) seems to affect the situation far less than the sex act and in fact may only be important so far as it prophesies the sex act.
So I guess I should have stated myself a little more clearly. Are you sure this woman in verse 24 is in a one flesh relationship? I don't think she is. Remember that one flesh is the term Christ uses to describe what we call marriage. It's the term the Genesis account uses as well. Taken as a whole I think Deuteronomy 22:22-29 seems to strengthen the idea that marriage begins with sex. It certainly doesn't do anything to disprove it.