My sister is a pathological liar. It started when she was very young and got worse as she got into her teen years. Now she grown and still telling lies. She believes her lies...it's a sickness that without help or treatment gets worse and worse. I had to cut off contact with my sister because everything that came out of her mouth was a lie. I now know she can't control it. She lives in her fantasy world. Sad...I wish my parents would have gotten her the help she needed when she was younger. Either way If I was in your shoes I would cut off contact. You never know what is a lie or what isn't and that is no friendship at all...