This woman became the target of her pious sister's cruel remarks at the pious sister's birthday party. The woman and her sister had long been at odds due to differences in values and the sister's resulting righteousness. See, the pious sister was a virgin and very proud of that fact. She and her boyfriend were waiting until marriage to have sex… Or so she thought. This story was posted to the r/AmItheA**hole subreddit by the woman, u/Swimming-Bird5149, or “Slutty Sister” in the story. She has p…