Anyway, I'm not wrong on the topic of this thread because, again, the scriptural verses and early Church Father writings in post #4 shows that those believed to be Jesus's half-siblings were actually His cousins. At the very least, Scripture alone shows that they weren't His half-siblings.
In Israel, also at the time of Joseph and Mary, a marriage comprised two phases: the engagement and the wedding. The rite of the engagement, by which the marriage was essentially established, implied that the young couple should be blessed by a priest while holding each other's right hand; a legal contract was made in regard to property and rights. During this first phase they did not live together. The wedding was the solemn accomplishment of the contract and the couple began to live together. This shows that sexual intercourse wasn't what consummated a marriage.