Higgy: Family relationships are very interesting. I am the youngest of 3 sisters and my middle sister is a lot like your younger sister (except she does not lie). I truly belief birth order really affects people personalities. You have to make some decisions about what you want. If you confront her, you risk destroying the relationship forever because she probably won't see it your way. However, you will be being honest and if she does understand, your relationship may improve tremendously. If you do confront her, you need to be careful how you phrase things. Don't start accusing and blaming her. You may want to really think about what you will say. But, you really need to think about what you want out of this situation. Chances are she is not going to change. You may either have to accept her as she is or just move on and realize that you will never have the relationship you want with her. I have chosen not to confront my older sister as I do not see what good will come from it. Good luck.