The Greek only further reinforces the understanding Joseph and Mary had children.
Perhaps if the Msgr knew more of the Greek he'd come to this understanding.
Perhaps if roman catholics would ditch learning Latin in their seminaries and focused on the Greek a lot of these questions would be resolved.
And throughout scripture these words are also used for relationships which have nothing to do with literal brotherhood.
You've allowed yourself to be blinded by 'context', otherwise known as 'your own agenda'.