Incest means having sex with someone from your family. This was a
common thing back in the days but is not considered normal any longer unless you live in Alabama where it's
still considered perfectly normal to fuck and marry your
cousin.
Alabama person: so this is my wife
KarenNormal person: Ohh I thought
Karen was your
sisterAlabama person: Yeah she is my sister, but she is also my wife
Normal person: But that's incest
Alabama person: I really don't see the problem