I use to feel bad but not anymore. Took a long time to realize some people don't deserve my time or emotions. For my inlaws. Shame on your narcissism. Learn to behave like an adult. Terribly sad how you all treat him.
take a piece of the inside of a banana peel and gently rub around on your teeth for about 2 minutes. The amazing minerals in the peel like potassium, magnesium and manganese absorb into your teeth and whiten them