Why do you continually deny God's Word (Scripture)? Is that what Catholicism teaches you?
Jesus had brothers! That is what the Bible says, so if you disagree with Scripture, you disagree with God.
"While Jesus was still talking to the crowd, his mother and brothers stood outside, wanting to speak to him." Matthew 12:46
"Pointing to his disciples, he said, “Here are my mother and my brothers." Matthew 12:49
“Isn’t this the carpenter’s son? Isn’t his mother’s name Mary, and aren’t his brothers James, Joseph, Simon and Judas?" Matthew 13:55
"After this he went down to Capernaum with his mother and brothers and his disciples. There they stayed for a few days." John 2:12
"For even his own brothers did not believe in him." John 7:5
"However, after his brothers had left for the festival, he went also, not publicly, but in secret." John 7:10
So either you're lying or Matthew and John, who knew Jesus personally, are lying. I (and most other Christians) believe that God's word is truth. So if you write something different, you are lying, intentionally or not.
John 8:31b-32, "Jesus said, “If you hold to my teaching, you are really my disciples. Then you will know the truth, and the truth will set you free.”