Sometimes health problems, etc can cause bad breath. Lots of weight loss diets, antihistamines, etc. cause bad breath. She should become aware of it if this is the case and take steps to remedy the situation. There is a product called breath remedy that rids the mouth of sulfur compounds that really helps. If it is a matter of just really bad dental hygeine, she needs to go to the dentist and get a cleaning and some help getting her mouth back in order.
With regard to vaginal odor, she could just need to shower. If she smells foul right after a shower, she may have a health problem or some hormonal imbalance going on. Either way, she should go to her gynocologist and figure it out. She could have vaginosis, a yeast infection, or even a venereal disease.
The flavor of the vaginal secretions changes in women depending on where they are in their cycle, their individual body chemistry etc. You will find that at certain times of the month, the vaginal secretions are clear, watery and very light. Other times, they are thicker, whiter and have more of a smell/taste.
Sorry to be graphic. Only trying to help.