I've been on another site for quite some time, but it's for Mental Illness, such things as bipolar, Generalized Anxiety Disorder (GAD), major depressive disorder. It's been helpful, but definitely doesn't cover the things that I need help with, with a 17 year old daughter who is recently diagnosed with Borderline (BPD). I'm particularly interested in Borderline (BPD) parents and how they handle different situations with their Borderline (BPD) kids. I am struggling with lying, and whether or not to believe her. Better yet, does it matter if I believe her? I'm told by her therapist that I'm to validate the feelings behind the lie, without validating the lie. I'm not really sure how to do that. While she lies regularly, she's now told a story of smoking too much pot, and potentially being sexually assaulted. I did all the things that I should, ER, STD tests, drug tests, she refused rape kit, and police contact. The problem is that I don't believe her. And then I feel terrible because what if it's true...I'm so torn, so any advice is appreciated.