[chesley]

The evidence actually seems to be the other way. this little passage, written long after the events record in the Gospels, certainly suggests otherwise.

1 Corinthians 9:5

New International Version (NIV)

5 Don’t we have the right to take a believing wife along with us, as do the other apostles and the Lord’s brothers and Cephas[a]?

Footnotes:
a.1 Corinthians 9:5 That is, Peter

[Elsie]

5 Don’t we have the right to take a believing wife along with us, as do the other apostles and the Lord’s brothers and Cephas?

AARRGH!!!

Half-brothers or Cousins!!!