My future sister-in-law is a BM, and her husband is a groomsman. They have 3 adorable boys. FSIL is constantly telling me that she's so afraid that youngest boy (2 years old) will start crying or yelling, or running around during the wedding. I've told her over and over again that she shouldn't worry about this. That I'm sure he will be okay, that I'll think it's kind of funny if he yells (I really will), and that if he's bieng so bad, I'm sure someone will take him outside. But she still calls and texts me several times a week freaking out about it. Does anyone have any polite way I can tell her to calm the f down?