Are you kidding?! If that line of thinking would be strictly followed, one should conclude that she is with him because of his position, and not because he is another human being she happens to love. I mean, come on, she is not his assistant!
And as for respecting his higher position.....perhaps at an official function where he is playing an official role...Then maybe. But when he is his own scruffy self, unshaven, smoking, in baggy jeans an t-shirt, incognito, on the streets of Paris minding his own personal business, she is walking behind him <out of respect for his position>????
This doesn't make any sense. With all due respect, Andrea may stem from a pretty ancient European tribe, but we're not talking Saoudi Arabian royalty here. We're talking about a guy from a culture where the life partner is regarded as equal, at least when walking on the street is concerned!
I think she's behind maybe because either he's just faster what with his long legs, or she is wearing stilleto heels and has trouble walking on them..