Is it permissible to marry a married man who flirts with women in a way that violates Islamic law, knowing that the father approves of him for fear of his rejection?

Both men and women must consider religious commitment and character when marrying, for the Prophet, peace and blessings be upon him, said: "A woman is married for four things: for her wealth, for her lineage, for her beauty, and for her religious commitment. So marry the one who is religiously committed, and you will prosper." And: "If someone whose religious commitment and character you approve comes to you seeking marriage, then marry him. If you do not do so, there will be tribulation on earth and widespread corruption." If the man is satisfactory in his religious commitment and character, then accept him, even if he is married to another, because Islamic law permits polygyny on condition of justice. However, if he is not committed, we do not advise marrying him, unless you believe you have the ability to reform him, keeping in mind that Islamic law does not prevent marrying him unless he openly commits major sins and persists in them. Weigh your need for marriage and the harm of not marrying against the man's situation and the potential harm of marrying him.