YES!!! Because, if She had other children, what is so special about Jesus? If She had other children because of Joseph, why should we believe that Jesus was God when it could be He was simply a product of Joseph. If Joseph fathered other children with Mary, then it could be reasoned that he fathered Jesus as well, as some may have believed. If She had other children after Jesus, then, it could have been deducted that Our Lady & St. Joseph couldn’t control themselves during their betrothal and nothing was special about Jesus because he also fathered other childeren.
Furthermore, why would God chose to give His heart to a woman who would only use it and have chlidren with another man? Either she would be using God or be a polygamist.
It matters so much because, like sex, one is supposed to give one’s whole self to one’s spouse, fully and wholely and completely, one flesh and all that, wives obey your husbands, husbands love your wives as Christ loved the Church; by not having sex with St. Joseph, Mary is completely God’s.
Protestants: What can I do so that you will understand She is your Mother? What can I do besides fasting and prayer that will make you research this case so that God may drop the scales from your eyes and you will not be proud in your ignorance?