He's looking a lot like Sonja here. That disdainful, quizzical look like they just smelled something bad. Sonja does it better though
I didn't even notice until you mentioned it
I've heard this facial expression described as "looking like they just smelled $#!*."
The bad upbringing and weak character for Haakon wouldn't surprise me if it is true. If I recall correctly, I read somewhere that Harald and Sonja spoiled their kids and didn't discipline them properly. I think this upbringing made Martha-L (with her seeing the dead, talking to animals, etc... claims) what she is like today.
What I heard was that Harald and Sonja never really set any parameters for who was "suitable" when it came to their children's romantic relationships, because they remembered the initial opposition to their own relationship and the difficulty in having it accepted. I can believe that.