Some so-called homewreckers are actually people whose only crime was being a bit gullible or a little too naïve. They truly did not know that they were sleeping with a married man or woman. Most of these unlucky lovers are short term flings. It is, after all, harder to maintain a falsehood the more time that passes. This does not diminish, of course, the pain that a fling causes the betrayed spouse.
When the lover is convinced that the adulterer is either single or divorced, they would never see the cheater wearing a wedding band. The one having an affair has to remove their ring anytime they visit their lover. Sometimes, however, a cheater makes a mistake with their wedding band subterfuge. They might leave it on top of their dresser and have to explain to an angry spouse why they went on a business trip without it. They might also wear it to dinner with their lover by accident. Worse still, they might lose it and be unable to explain to their lover why they are panicking or give a sufficient explanation to their angry spouse about why their wedding ring has disappeared.