So, when exactly did Joseph actually marry Mary? In Bethlehem, in Egypt, in Nazareth? Where? When did they start sleeping together? Catholics say Mary was ever-virgin. You (plural) say she was not. So, when did she marry Joseph? If you (plural) are so positive that Christ Jesus had brothers and sisters by Mary, how many, who were they, and when were they born? And in what town?
Look up all your questions - this way you can argue with yourself if you don’t like the answer.