Maybe it WAS a brief hood retraction (he did say "a few seconds" which may have really been a second) as part of the external vaginal exam, and the doc may have saved that as the last thing or almost before concluding to her that she was a "perfectly healthy woman" in reference to the whole exam, keeping everything in a professional context, though the patient may or may not think otherwise.
After whatever actually happened, it's a game of "telephone". The aunt shares her account of the exam with her nephew, who in turn shares it with others. Suddenly what may have been an appropriate part of an external vaginal exam has been translated into sexual assault via "telephone".
Two things to consider when being judgmental on the event/disclosure sequence. The professional relationship between doctor and patient on a comfort level, especially since the doctor is a woman, that no chaperone was present. Perhaps the doctor doesn't typically use a chaperone because maybe the patients don't complain since the doctor is a woman or they bring their own anyway. That's one unknown to us here.
The other thing is the relationship between the aunt & nephew. We all have different relationships with family members. Some we may discuss every intimate detail; others, we wouldn't give the time of day. That's another unknown.
Having pointed out those 2 unknowns, hopefully that will suppress the all the questions, challenges & flags