Tale of Tales

Austin was watching Tale of Tales on Netflix. I came in during the part where the girl is running away from her husband. The guy falls into a ravine, survives, then chases down a family of gypsies and finally rejoins his wife, the girl, and she slits his throat.
Me: Why did she do that?
Austin: Her father married her off to an ogre.
Me: Was he mean to her?
Austin: No. He took care of her, all that.
Me: Then why did she do that?
Austin: Because he’s an ogre.
Me: So?
Austin: She’s a princess.
Me: So?
Austin: He’s an ogre.
Me: Yeah.
Austin: She’s a princess. A princess can’t be married to an ogre.
Me: They must not have heard about Shrek.