—> I don’t know if it’s true or not, but I have heard that Mary didn’t really know for sure, what Jesus’ mission was, till he walked out of the tomb.
I think that is likely correct.
She knew everything eventually.
So did James and Jude, the half brothers of Jesus, the natural sons of Mary and Joseph, after they did the evil deed (sex) We don’t know if the other half brothers and sisters of Jesus became believers, but I hope they did.
Also, when Mary, and his half brothers came to see Jesus, I think they were trying to get him to either stop his ministry, or tone it down. They thought He was bringing unwanted attention to the family. They didn’t understand His purpose. Later, they did. No mention of the sisters of Jesus, or Joseph being there.