Okay, here is how to engage in a relaxed reading of the gospel text, to see that the “adelphos” and “adelphe” in Mark 6:3 were really cousins of some sort…
**1 ****He departed from there and came to his native place, accompanied by his disciples. ****2 ****When the sabbath came he began to teach in the synagogue, and many who heard him were astonished. They said, "Where did this man get all this? What kind of wisdom has been given him? What mighty deeds are wrought by his hands! ****3 **Is he not the carpenter, the son of Mary, and the brother of James and Joses and Judas and Simon? And are not his sisters here with us?" And they took offense at him. Mark 6:1-3.
In Verse 1, note that they are in Jesus’ “native place,” Nazareth in Galilee.
Now, Jesus’ mother Mary has with her there in Galilee these “adelphos” named James and Joses and Judas and Simon, and un-named “adelphe.”
Are these “adelphos” and “adelphe” with Mary the mother of Jesus, in Galilee, children of Mary the mother of Jesus? Or, are they something else?
First, carefully read Matthew 27:55-56…
**55 ****There were many women there, looking on from a distance, who had followed Jesus from Galilee, ministering to him. ****56 ****Among them were Mary Magdalene and Mary the mother of James and Joseph, and the mother of the sons of Zebedee. **Clearly, the “Mary” in Matthew 27:56 is not Mary Jesus’ mother. Matthew refers to Mary Jesus’ mother as “Mary his mother.” See Matthew 2:11. And referring to Mary Jesus’ mother as “Mary the mother of James and Joseph” is like referring to Napoleon Bonaparte’s mother as “the lady who was mother-in-law to Josephine.”
There’s no doubt about it, the Matthew 27:56 “Mary” was not Jesus’ mother.
Now, note well: Matthew 27:55 says that this Mary who wasn’t his mother followed Jesus from Galilee – she was in Galilee with him!
That’s where Mark 6:3 finds these “adelkphos” named James and Joses and Judas and Simon, and certain un-name “adelphe,” right?
Now note the names of two of these children of this Mary in Galilee who wasn’t Jesus’ mother, in Matthew 27:56: *James *and Joseph! Is that Jamnes and Joses?
Now let’s jump ahead to Mark 15:40-41:
**40 ****There were also women looking on from a distance. Among them were Mary Magdalene, Mary the mother of the younger James and of Joses, and Salome. ****41 **These women had followed him when he was in Galilee and ministered to him. There’s that same Mary who wasn’t the mother of Jesus who was with Jesus in Galilee. Again she is identified as the mother of “James” and this time of *“Joses” *-- not “Joseph,” but clearly the same kid. Our i.d. of that Joseph as “Joses” turns out to be correct.
And the Mark 15:40-41 Mary has another child – an “adelphe,” Salome!
Finally, note well: While Mark 6:3 calls the kids there “adelphos” and “adelphe” of Jesus, *it does not call Mary Jesus’ mother *their mother!
Conclusion: The ones called “adelphos” and “adelphe” of Jesus in Mark 6:3 are apparently the children of a Mary who is a relative of Mary Jesus’ mother, where this Mary who is a relative of Mary Jesus’ mother was in Galilee, with her children, at the same time as the events of Mark 6:3.
Voila: There is no evidence in the gospels that Jesus had “brothers” or “sisters.”