I know Ned & Chloe are only pretending to be a couple. But if Ned is Lila's grandson, and Chloe is Lila's cousin, then why are they married?
Good question. I wondered this too. Chloe is a very distant cousin of Lila. So there's really no blood relation between Chloe & Ned.
Is Chloe related to Jason? How?
Well, yes. Chloe's a very distant cousin of Lila, who is Jason's grandmother (biologically). After his amnesia, Jason decided to take on the last name Morgan, which I believe was Lila's maiden name.