[The look Anders gets should speak for itself but in case it doesn't-]

One, our 'two families' includes Loghain. I doubt she'll like me after I execute her father as a traitor. [Which is not negotiable. Loghain is going to die for what he's done and it doesn't matter what Anora might have to say.] And two, she was married to Cailan. My half-brother? That's a little weird.

[Marrying his half-brother's widow like she was a shirt handed down after Cailan out-grew it just seems.... Weird.]