Hello. I'm a 28 year old married man. I have been with my wife for five years and I recently started going down on her, but I noticed that her inner vaginal lips are a little black at the end, which must have just started happening because it wasn't like that before. I'm confused because she washes herself a lot and does it carefully. I'm not sure what the problem can be, an infection maybe? Someone help I don't know if she knows about it, and I'm scared to tell her because it might embaress her, she's very cautious about me going down on her and tries to get me to not see her vaginal area, so I'm guessing she does know about it, I don't know what to do.