And lots of couples do exactly what has been suggested. There was a couple in our congregation who divorced. The ex-husband became a major apostate protestor in Brooklyn (which was, needless to say, a huge embarrassment to his ex-wife), but he never "committed adultery" or remarried.
She met someone else--an elder from a different congregation--and they fell in love. They bit the bullet and got married. They were both disfellowshipped, but were reinstated as soon as the proscribed "repentance period" was completed.
Totally ridiculous, but they thought they were following "God's" rules.