Younger Sister Uncovers Family Secrets by Exposing Sister’s Affair, Ending Her Wedding Plans

This younger sister always felt like the black sheep next to her golden-child sister, Anna, who could do no wrong in their parents' eyes. So, when Anna drunkenly confessed she was cheating on her amazing fiancé, Jake, with her high school ex, the younger sister was torn. Anna begged her to keep it quiet, saying it was just a "little fling" before settling down. To all the readers out there, that is definitely not a thing. But when Jake later gushed about how "trustworthy" Anna was, she couldn't keep the secret anymore. So, the younger sister did what had to be done. 

Anna denied everything and accused her of being jealous, and their parents actually backed her up. Turns out, they'd even covered for Anna before, and the details are juicy. Now, her family has cut ties and is accusing her of ruining Anna's life. Was she wrong for exposing it all, or just doing what was fair?