So my future Mother-in-law and sister-in-law are so gross. They burp so loud and gross all the time. I'm so embarassed to go anywhere with them. They do it at the table while we're eating, at home and in restaurants. And most of the time, they don't even say, "excuse me". My fiance's sister loves to lean over and fart whenever possible as well and she see's nothing wrong with it. She's 24 years old, single, so weird and has no friends. I honestly cannot stand the girl. I'm so appauled by them. I don't want them acting like this at our engagement party, rehersal dinner or wedding. What should I do? And these burps, they aren't suttle little things, they are in your face, not even tried to be held in, let them rip kind of burps. HELP PLEASE!!!!!!!!!!!