"
the westbound number nine
Ma, I see you're ashamed to look me in the face
As if I was nothing but a past mistake
Sittin there at night when Pa comes stumblin in
Full of the Deacons bathtub gin
Swearin and a-cussin that I wasn't no kin
I heard
Makes the song obviously about his Ma cheating on his Pa, getting pregnant and feeling ashamed about it. Doesn't matter if it's true on not, he's catching the Westbound #9!