According to The Crazy Bird:
"The story is that she worked for the Pete Seeger family as a housemaid. Then they discovered she could do more than mop and she started a carreer at quite a ripe age."
It seems that every time I check into this forum there's really stupid misinformation being spread about.
Libba Cotten never worked for the "Pete Seeger family." She worked for Charles Seeger's family with his second wife, Ruth Crawford Seeger. Pete was a son of Charles Seeger and his first wife, Constance. By the time Libba came to work for the Seegers, Pete was close to 30 years old and long gone from the family home.
Furthermore, Libba's work with the Seegers was mostly child care and cooking, not mopping.