Women can have an imbalance of certian hormones, like testosterone, that can cause growth of hair similar to men. Another cause could be a really bad photograph. Good luck to your brother and fiance!
is caused by hormonal changes, which stimulate a temporary increase in your body's production of melanin. People with darker complexions are more prone to this condition than people with lighter skin.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.