There were no brothers and sisters. That’s why Christ gave his mother to John’s care.
Did you read the article? any of the links? Especially the highlighted ones that have to do with language?
Yes, this time and all the other times this comes up on FR.
Whether Mary and JOseph had other children doesn’t really matter to the story of our Salvation, even though I do believe they had other children (which can be found in the Bible, despite efforts to explain it away). People on this post expound on the duties of the Jews towards their families and if there were other children, they would have taken care of Mary. By that same token, a young Jewish couple would “be fruitful and multiply” as God commanded. Nowhere in the Bible did God command Mary to have only Jesus. To say that Jewish families back in the days of Jesus never broke apart over serious disagreements of faith is wrong. Shunning was a practice then as it is to this day for orthodox believers. I believe that Jewish followers of Jesus suffered the most at the hands of their own families. Persecution was rampant among the various sects (e.g., Paul before his conversion).
It will all be known in the Great Hereafter. That’s when I fully expect to find out what really happened. In the meanwhile, The Bible is all I need. It’s got all the answers that count. No more, No less. Isn’t that what the Bible tells us?