like the title says,,, my sibling (F,21) is a pathological liar. This has started ever since she was a child-- at the age of 11/12 she was creating fake paperwork to go on "school trips" (which turned out being her lying to go to a separate and completely other field trip) . She went on a lying rampant for a long time (at elementary and middle school age) and stopped after my parents would catch her and punish her. We all thought she learned her lesson, but i'm thinking she learned to hide her lying skills.

fast forward to her being 21. just found out everything has been a lie. over the summer, she stole a years worth of my work at a fast food resturant and scholarship money, and thousands from my parents. two years ago she moved into an apartment that she claimed was given to her by her schoalrship program... come to find out the scholarship program and the apartment was a lie. she had moved into the apartment paying for the expensive rent using OUR money. 

she is about to face eviction, and when i confront her, she tells me that the "scholarship" hasn't paid for it yet. however, this lie was busted when her landlord herself told me that my sister claimed she wasn't able to make payments because our mother has died... WHEN MY MOTHER IS VERY MUCH ALIVE!!

This isn't the only thing she's lied about. she lies about making dental appointments for my mom, and when we show up to the clinic, there isn't an appointment set up. It's very clear there's something wrong with her, and when i try to express that she needs help for lying, she claims she is already seeking help, and there is nothing wrong. she is living in a false sense of reality, thinking she can lie her way out of everything. I know most people would tell me to take this to the police but my mother wouldn't be able to handle the embarassment. reddit, what shoud i do??