1. As has been stated in one of the other answers the Lord Jesus made at the age of twelve a public distinction between His Father and Joseph and stating that He must be about His Father's business (KJV); not house (ESV). Else He would have spend the rest of His earthly days in the Temple...
Luke 2:41-52 (KJV)
Now his parents went to Jerusalem every year at the feast of the
passover. And when he was twelve years old, they went up to Jerusalem
after the custom of the feast. And when they had fulfilled the days,
as they returned, the child Jesus tarried behind in Jerusalem; and
Joseph and his mother knew not of it. But they, supposing him to have
been in the company, went a day's journey; and they sought him among
their kinsfolk and acquaintance. And when they found him not, they
turned back again to Jerusalem, seeking him. And it came to pass, that
after three days they found him in the temple, sitting in the midst of
the doctors, both hearing them, and asking them questions. And all
that heard him were astonished at his understanding and answers. And
when they saw him, they were amazed:and his mother said unto him, Son,
why hast thou thus dealt with us? behold, thy father and I have sought
thee sorrowing. And he said unto them, How is it that ye sought me?
wist ye not that I must be about my Father's business? And they
understood not the saying which he spake unto them. And he went down
with them, and came to Nazareth, and was subject unto them:but his
mother kept all these sayings in her heart. And Jesus increased in
wisdom and stature, and in favour with God and man
2. He also throughout his ministry never called Mary "Mother" but rather "Woman". Respectfully, but to not place any spiritual authority with her as Roman Catholicism does.
And when they wanted wine, the mother of Jesus saith unto him, They
have no wine. Jesus saith unto her, Woman, what have I to do with
thee? mine hour is not yet come. His mother saith unto the servants,
Whatsoever he saith unto you, do it.
Now there stood by the cross of Jesus his mother, and his mother's
sister, Mary the wife of Cleophas, and Mary Magdalene. When Jesus
therefore saw his mother, and the disciple standing by, whom he loved,
he saith unto his mother, Woman, behold thy son! Then saith he to the
disciple, Behold thy mother! And from that hour that disciple took her
unto his own home.
3. For the Lord Jesus Christ to be a sinless sacrifice must mean that He never sinned, not even as a child. For a child not to sin takes some extraordinary, supernatural work because it is simply an impossibility. Every child sins in so many ways even when they are but a few weeks/months old; as any parent can testify when watching that first tantrum... So for the Lord not to have sinned must mean that He not only was aware of His sinless holy Nature, but that He was by this Godly Nature able to restrain Himself from sinning, even as a little babe.
For we have not an high priest which cannot be touched with the
feeling of our infirmities; but was in all points tempted like as we
are, yet without sin.