The version in the Rise Up Singing songbook is Step It Out, Nancy, a 1979 rewrite of "Step It Out, Mary" by Robin M. Williams and Jerome Clark. The additional Holly Near verse at the end is this:

The moral of this story is not that murder pays
But that women must not be bought and sold, neither then nor nowadays
We will choose our lovers, we'll live out our own lives
We'll love whom we please with a passion and a sparkle in our eyes.

Holly Near: https://www.youtube.com/watch?v=88lKY6jeiDo (may not play outside the U.S.)

Robin & Linda Williams: https://www.youtube.com/watch?v=aWdmUqb6Ojc

The High Kings: https://www.youtube.com/watch?v=YmLAxbjsNb0