Her stories are not straight for sure, but I don't think that necessarily means she is lieing. IMO the problem with her is that, when recounting a story, she fills in the gaps with madeup stuff based on what she thinks likely happened. Not on purpose, she just subconciously extrapolates, and ends up getting things wrong. Likely she has been doing that all her life, and it just seems normal to her. It probably causes a lot of unneccessary drama in her life. In this case it is causing suspicion to be cast all over the place and probably really mudding the water when it comes to finding out just what happened to her daughter.