My sister has recently tried to make two different demands for our wedding or she says she will drop out. The first one is that she wants her step-son to be allowed to attend. We are having a child free wedding except for my fiancé's two nieces and one nephew who are in the wedding. She is trying to argue that the her husband only gets to see his son on weekends so he would have to give up seeing his son to attend the wedding. However, the wedding is only an hour from their apartment so I'm not sure why he'd have to give up his entire weekend with his son. Her other argument is that we should make him a ring bearer. But we barely know her step-son. My sister married his father after only a year of dating and they have only been married a few months. We live in another state so I've only met the step-son a handful of times whereas my fiancé and I are very close to his nieces and nephew. The second demand is that my entire family delete her ex-fiancé from Facebook. They dated for over four years and he lived our with family during most of that time so we are all very close to him. Two years ago, they had a terrible break up where she kicked him out of their apartment and he nowhere to live, she stole his money, and she cheated on him so during the breakup my parents offered him a temporary place to stay because he had nowhere to go and they didn't want to see him living on the streets. My sister felt everyone was against her, but being that he was like another child to my parents and another sibling to my brother and I it was very difficult to turn our backs on him after everything she put him through. Months later she tried to get back together with him, but after everything she put him through he said he wasn't willing to get back together, but he said they could stay friends, but she was livid he refused to get back together with her. She started demanding a month ago that we delete him on Facebook. The day she brought it up was when his mom passed away. My sister still talks to his younger sister on a regular basis so his sister told my sister their mom died so my mom reached out offering condolences and my sister lost it on my mom and told her we needed to delete him immediately. Needless to say, none of us did because he was experiencing a very upsetting situation with his mom suddenly dying. Does anyone have any advice on how to handle her two demands?