I'm so riddened with emotion right now

I'm beginning the countdown when we break the news to my little sister that she's not going back to UT Austin for the Fall and that instead, she'll go to her home university. It's been pretty overwhelming for me for the most part today stressed out about what her reaction might be. Knowing her she'll definitely throw supersized temper tantrum at our mom and possibly me when I intervene. Yes I realize that I set the bad example here by not giving in and leaving UT even after things were going down the drain. But life isn't always fair, as put together by one of my colleagues a few weeks ago. She was like "life isn't fair deal with it". Somehow I'm gonna have to sink that into my sisters pea-brain. She doesn't realize that her future is at stake here. All I know is that that spoilt rotten attitude will never help her raise that 2.1 GPA of hers, meaning if mom and dad send her back they are only hurting her future. And somehow I'm gonna have to help her realize that. *sigh* hopefully the task of convincing her that staying at home for college is the right solution won't be as daunting as I perceive it to be.