Can you help me out with the perpetual virginity of Mary?

I have a friend that uses Matthew 1: 25 against the perpetual virginity. Can you help me out with this?

The following links should help you understand the Church’s position on whether Jesus had brothers. If you have any further questions, please contact Catholic Answers directly.

Recommended Reading:

*] Doesn’t Scripture imply that Mary had children other than Jesus?
*] Did Jesus have brothers?
*] Brethren of the Lord - Catholic Encyclopedia
*] Brethren of the Lord - Tract

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