RUSTONLF

They also both have the same last name in the credits. They are definitely brother and sister. This movie has a questionable stance on incest though since they believe a daughter who is eye raped by her dad would think nothing of it and not be uncomfortable.

Omission: No one mentioned that it took a team of people to change Sean Archer into Castor Troy (including someone to cut his hair!) so that the body would match. When Castor decides he wants Sean Archers face on his body did his team of thugs go and wake up that team in the middle of the night to make changes to his body and what did they do to that team? Also remember that would include someone who could fatten up Castor (because we were told Archer had to have his "love handles removed").