I'm no expert, but I'm beginning to wonder how competent your therapist is. Why does she think she needs to talk to all your family members? The therapy is about you and your recollections and your feelings about them. She's not supposed to be a detective trying to find factual evidence. It seems to me she's causing you harm by planting all these disturbing ideas in your head. She should be working with the person sitting in front of her only.