The age of adulthood and consent are clear in the Bible. It is the age of 20. The age of consent in the Bible is 20.
You can find the age of adulthood and consent in BIBLE books Numbers 14: 26 - 35 - Leviticus 27: 4 - 7 Exodus 30: 14.
Mary had to be 20 or older to be married as anyone under that age was considered a child and called a little one by YHWH.
1:28 And the angel came in unto her, and said, Hail, thou that art highly favored, YHWH is with thee: blessed art thou among women.
The angel of YHWH addressed Mary as a woman. A consenting adult.
1:41 And it came to pass, that, when Elisabeth heard the salutation of Miriam, the babe leaped in her womb; and Elisabeth was filled with the Set-apart Spirit:
1:42 And she spake out with a loud voice, and said, Blessed art thou among women, and blessed is the fruit of thy womb.
Elisabeth, an adult addressed MARY as a fellow WOMAN. A consenting adult.
This means that Mary was at least 20 years of age because she was a woman, not a girl.
6 But whoso shall offend one of these little ones which believe in me, it were better for him that a millstone were hanged about his neck, and that he were drowned in the depth of the sea.
Sexual sin with children is the most heinous. Children are taught to be obedient to adults and when that adult takes advantage of that child he is like a murderer. He murders the child’s trust in adults, he murders their innocence, he murders their confidence and attempts to destroy their childhood. It sets the child on a path of associating love with sex and oftentimes the child will start to have sex with others their own age way to early resulting in the child becoming a parent when they are not ready which sometimes results in another murder which is abortion. Man selfishness and perverted desires destroying lives, that is the work of Satan.