So, how close is too close to get married to a sibling. We have a sibling that was engaged first (6 months before us) but planned their wedding 8/18/18 (~2 years later). We got engaged a month ago and tried to set a date of may or june 2018 to get the venue we liked. Then we got angry phone calls from the sibling getting married and also their mother (future mother in law, who is usually reasonable). I don't want to wait until after their wedding because planning causes me so much anxiety. I want it to be over. The sibling kicked my finance out of his wedding and said they wanted nothing to do with ours because of the date we picked? Did I really do something wrong? I feel like it is not a big deal to get married first but apparently it is to them. Someone help me,....