Ancient Rome wasn't exactly known as a bastion of good taste, but we have to think that even they would be a little squicked out about what happens between Octavian and his older sister Octavia. First of all, giving your kids names that are almost exactly the same is a bad idea. That's just asking for siblings to get too close to one another. Really, their parents have no one to blame but themselves when Octavia gets the bright idea of trying to seduce her brother to get information out of him. Here's a little tip for you, Octavia: when you're trying to get your brother in the mood, don't lead with a story about how he used to come running to your bed every night when he was little. Because that's just creepy. Even Octavian, a guy with some decidedly non-vanilla kinks, knows that incest is wrong. To which Octavia replies, "you and I are above such petty social conventions". Uh...Octavia? Pretty sure that not sleeping with your brother is on a whole different level from wearing pants in public or asking someone how their day was even if you don't care.