Lindsay Lohan cares about her little sister Ali. That's why, when Lindsay was in rehab at Wonderland, she had Ali come and visit her - so Ali could learn first-hand the dire consequences of a life of drinking and drugging. Says Lindsay:
There are certain things I don't cross the line talking to her about, but she's pretty observant and she's witnessed a lot, especially between my parents. ... She came to see me in rehab - I wanted her to see what it was like, so she'd never want to be in a place like that.
Gosh Lindsay, you are such a caring older sibling. Practicing this aversion therapy on little innocent 13-year-old Ali. Bringing her to Wonderland so she would find out what it's like to be in rehab. I'm sure that seeing the inside of a posh rich-person treatment facility - a place that let you come and go almost as you pleased - will put her off of partying forever. And of course, since leaving rehab, you have provided such a sterling example for Ali by your personal conduct. You are walking the straight-and-narrow now Lindsay - no more cocaine binges or insane antics for you. All Ali need do is emulate your behavior exactly and she will lead a happy and fulfilling life, never requiring treatment at a rehab facility, or a liver transplant, or an iron-lung.
Lindsay Lohan - she's an inspiration to us all.
(source)
