I think the responsibility falls on MO. She has a responsibility to display the manners to comes with being a first lady. She does not ‘know’ Bruni and should not confide in her as if she does. Her complaints should be with a good friend or her husband. I don’t think any person of a high position in a company would complain to a client that they just met about how dreadful their job was. It would be bad for business and make the business look bad, right? Well, her complaints do the same.
You can make this about Bruni, but that does not change the subject at hand.
There are two subjects at play here. Why be surprised that MO made a wildly inappropriate comment. That’s what she does. The story here is a sitting first lady revealing private conversations. I think this says so much more about Carla than about Michelle. That’s my opinion. What happens when the two get together again?