I'm praying for your Niece PM. Sometimes people have to hit a brick wall before they open the door and let Jesus in. That is great that she has indicated she wants to go to church with you. If she does open her heart to Christ, He can rid her of the lying. Trust is an important ingredient in every aspect of life, which is dependent on personal relationships, including work, friendship, love, and family. If someone wants to be believed when speaking the truth they must have credibility, and that will take time for her to gain back credibility, so she can be trusted.