Charles Ellicott Commentary Deuteronomy 22:23-27

"If there be a damsel that is a virgin betrothed unto a husband, and a man find her in the city, and lie with her; then ye shall bring them both out unto the gate of that city, and ye shall stone them to death with stones; the damsel, because she cried not, being in the city; and the man, because he hath humbled his neighbor`s wife: so thou shalt put away the evil from the midst of thee. But if the man find the damsel that is betrothed in the field, and the man force her, and lie with her; then the man only that lay with her shall die: but unto the damsel thou shalt do nothing; there is in the damsel no sin worthy of death: for as when a man riseth against his neighbor, and slayeth him, even so is this matter; for he found her in the field, the betrothed damsel cried, and there was none to save her." — Deuteronomy 22:23-27 (ASV)

Deuteronomy 22:23–27. PURITY OF THE BETROTHED.

His neighbour’s wife. —It is evident from the language of this precept that a betrothed virgin in Israel is regarded as a wife. The man who humbles her hath humbled his neighbour’s wife.

This illustrates the language of Matthew 1. Joseph, when Mary was found with child, sought to put her away (as though she were already his wife). The angel said to him, Joseph, thou son of David, fear not to take unto thee Mary thy wife. He took unto him his wife.

From the construction of this law, it follows that Jesus was the son of Joseph, according to the Scripture. The Evangelists do not seem to think it worthwhile to prove that He was the son of David except through his father (in law).