Catholics believe that the Blessed Virgin Mary always remained a virgin. She never had intimate relations with St. Joseph — Jesus being conceived in her womb by the Holy Spirit.
While many Protestants believe in Christ’s miraculous conception, they hold that Mary and Joseph had other children after our Lord was born.
But Scripture, the Church Fathers and even the early Protestant Reformers are against them.
Here’s the evidence that Jesus was indeed Mary’s only child.
The “brothers” of Jesus mentioned in the Gospels are not his blood brothers.
In Matthew 13:55 we read, “Is not this [Jesus] the carpenter’s son? Is not his mother called Mary? And are not his brethren James and Joseph and Simon and Judas?”
Sure sounds like Jesus had siblings!
The first-century Jews used the word “brother” to mean more than blood brothers. It also meant “cousin” and, in some cases, “uncle.” The Hebrew and Aramaic languages don’t have a word for “cousin.”
Scripture confirms that James and Joseph are not Jesus’ blood relatives. In Matthew 27:56, they are identified as the sons of a different Mary than Our Lady.