Unusual American song from 1947

Many people complain about modern music and many of the complaints are about the lyrics. It was a different story back then! Here is a 1947 composition by a musician from Alabama.

The song tells the story of a man who married a widow, and his father married her daughter. After that, his father and stepmother had a son, who became his half-brother, but also his grandson. And since he is married to the grandmother of this child, he became his own grandfather.