Most @#$%ed up family tree ever
So let me see if I got this right based on what the novels reveal.
Malcolm had sex with his mother, which resulted in his mother giving birth to Malcolm's brother/son.
The son/brother married Malcolm's daughter, Corrine, which resulted in her giving birth to Cathy, Chris, Carrie, and Cory.
Chris and Cathy become lovers, resulting in Cathy getting pregnant, but she has a miscarriage.
Cathy gets pregnant by Julian and gives birth to Jory, and it's implied that Julian had sex with Carrie.
Cathy gets pregnant by Corrine's second husband and gives birth to Bart.
Cathy and Chris live as husband and wife, and adopt Cindy.
Bart begins having sex with Jory's wife, who gives birth to Darren and Deidre, who could be either Bart or Jory's kids.
Jory's new love interest temporary gets together with Bart, before it's implied that she marries Jory and gets pregnant, the father being either Jory or Bart.
Bart and Cindy get married.
Seriously, wtf? Are Darren and Deidre going to continue the "tradition"? So messed up.