I recently observed that a faculty (husband) was a corresponding author in all the publications of his wife (first author) while she was doing her Ph.D. in the same department. Although the wife had a different advisor and her husband (a professor) was not on her Ph.D. committee, all the papers she published had her husband as the corresponding author. While talking to her it is apparent she has very little idea about her research and publications.
Would this be considered a conflict of interest? If so, are there any rules governing this type of research misconduct?