Dear Amy: After many years, and with the help of prayers and science, I am pregnant and - along with my family and friends - looking forward to a celebratory baby shower. My issue is whether I must invite a narcissistic sister-in-law (my brother’s wife), or if it is appropriate to only invite her daughters, ages 10 and 14. Over the years my relationship with my SIL has deteriorated to the point that she refuses to speak to me, and we have to have separate family holidays. I would never invite this person to any event, but her daughters and I maintain a loving relationship. From your perspective, is it appropriate to address the invitation to my nieces alone? I would really miss their presence, but cannot stand the thought of their mother attending this special day.