Deu 24:4 Her former husband, which sent her away, may not take her again to be his wife, after that she is defiled; for that [is] abomination before the LORD: and thou shalt not cause the land to sin, which the LORD thy God giveth thee [for] an inheritance.
Something that keeps coming to my mind and I don't think it has been referred to yet is Genesis 2:24.
"Therefore shall a man leave his father and his mother, and shall cleave unto his wife: and they shall be one flesh."
If two people are one flesh, they divorce and either (or both) of them remarry, are they "one flesh" with their new spouse? If so, this leads me to wonder how many times can a person become "one"?
Just another something to consider.