The Miracle Drug My Boyfriend Gave Me

My younger sister found a boyfriend who taught her how to stop her period. He said that if she took the medicine he gave her, her period would definitely go away. I warned her not to take random pills, because they could harm her health. She listened to me, and when her period came while she was on a date with him, it ruined their perfect date. After a huge argument, he said he wanted to break up. After that, my sister cried her eyes out and blamed me for destroying her perfect relationship.