"She is known to dislike publicity, and told the TV that flying was difficult for her." She told the TV that flying was difficult for her? Never mind marital problems, I think she's got mental problems.
Anyone would have serious mental health issues after 30 years with that lovely person. Not a word I use lightly by the way.
To be fair to Mrs Putin, I also find flying difficult. So difficult, in fact, that I haven't managed it yet. It's probably impossible, but until I've exhausted every conceivable method then I'm still referring to it as difficult. I reckon a more clear cut sign of her being a nutcase would be if she told the media she thought flying was a doddle.