Interesting idea. Since we know that the siblings of Jesus, the children of Mary and Joseph, didn’t believe in Jesus while He was with them. I think they believed in Him later, as James and Jude (Jesus’ brothers) wrote books in the New Testament.
Who knows for sure, but it’s possible that Mary didn’t believe in Jesus (to the saving of the soul) either, till after the resurrection. She was with the disciples after the resurrection, but we simply don’t know at what point she became a born again, truly saved sinner.
The thing that has always left a bad taste in my mouth, is when she and her kids were outside, to speak to him. About what, I don’t know, but it just didn’t look good to me. Were they trying to to get him to stop doing his ministry, since they thought He was putting the entire family at risk? I have no idea, but it is interesting. 👍😁
Mostly likely the "brethren" wanted to Him out, "For neither did his brethren believe in him." (John 7:5) while Mary wanted to express concern. In any case, the event you reference is a revealing testimony against Mary having the Catholic status in which she is never refused. For given a prime opportunity to exalt her, while Mary "his mother and his brethren stood without, desiring to speak with him," (Matthew 12:46) rather than cutting things short and going to her in conformation of her presumed compelled Catholic priority of attention, the Holy Spirit of Christ nowhere recorded He even did here, and instead the Lord's response is to equate her will all who do the will of His Father:
But he answered and said unto him that told him, Who is my mother? and who are my brethren? And he stretched forth his hand toward his disciples, and said, Behold my mother and my brethren! For whosoever shall do the will of my Father which is in heaven, the same is my brother, and sister, and mother. (Matthew 12:48-50)
One small point: Mary was with the Apostles/disciples on the Day of Pentecost when the born again event began; we may presume she too was born again on that same day by the Holy Spirit entering her ‘separated spirit from the soul’ work of the Word of God which acted upon all who heard and believed in their spirit the Gospel message.