She is threatened by you and is probably envious of you because these guys showed you interest and not her. When you understand and read about how a narcissist functions, it becomes a little easier to deal with them. Underneath that mask and facade is extreme insecurity and feelings of inferiority. That's why they must put others down... to feel more powerful and to overcome those feelings of inferiority. You can feel sorry for this woman. If you can, try not to let her run you off from your family gatherings. That's exactly what she wants to accomplish -- is to intimidate you. Rise above it and just avoid any conversations with her. Entirely. Hugs to you.