Nice comics. I lol'd.
And yes, Schala is a whore. Now how would she feel about herself if she knew she was touching her little brother that way?
As for Magus there... I guess he's supposed to be someone else when he's the prophet so he's taking advantage with every woman he sees and he didn't want her jealous or suspicious. His smile is cause he's thinking "Heh heh heh, Schala's touching me thinking I'm hot and that I'm touching her cause she's hot when really it's all because we're related!"?