Prof. Dr. Rafiat Fawzy says:
Allah Ta’aala says: “O mankind, indeed We have created you from male and female and made you people and tribes that you may know one another. ” (Q49:13)
Marriage is one of the sunnah of Allah. He does not establish a relationship between two spouses only, but a relationship between two families – the husband’s and the wife’s families. Therefore, Allah has made them Mahrams and they can mix with one another.
The one who engaged with a young lady did not take this into consideration, and did not take kinship into account. Such people did not come into the homes from the front door as ordained by Allah the Great and His Messenger, peace be upon him.
However, this marriage contract is valid in Shariah as long as it was with the consent of both the man and the woman, and with witnesses. It is also legally right if it was documented by the authority.
The parents will be advised to pardon the lady for what she did wrong and never to break ties with her even when she needs them, because she will surely need the family. She should find them next to her in order for her not to be a captive of the man and the family that supports him. If she feels injustice or wronged, the family should preserve her dignity and give her their protection.