It's remarkable how common it is for the parents of the bride and groom to think the entire wedding is about them. Of course, if they contributed to the event financially or emotionally, of course, they deserve a voice. However, even parents who pay for an entire wedding should understand that they are not going to be the center of attention the entire time. This entitled mother-in-law didn't even contribute a dime, and yet she still felt the need to stir the pot and cause a scene. First, she r…