Talk:O Brother, Where Art Thou/@comment-25916135-20150721005857/@comment-5660329-20150721012254

^ I don't own this book (Turner, Jeffrey S. (1996).  Encyclopedia of Relationships Across the Lifespan. Greenwood Publishing Group. pp. p92.), but this was on the wikipedia page and when I clicked on the source it gave me:  "Many states also apply incest laws to non-blood relations, including stepparents, stepsiblings, and in-laws"  ... so yeah, it kind of does.