ANSWER: God does not approve of a woman who has sex with more than one man, just as He does not approve of a man who is involved in more than one sexual relationship. God created man and woman in his image (Genesis 1:27) and He meant for man and woman to be united in marriage (Genesis 2:24).
In answer to a question from the Pharisees, Yahushua quotes Genesis 2:24, how God had intended marriage to be: the union of one man and one woman, living together faithfully (Matthew 19:1-9). When a man divorces his wife and marries another woman, he commits adultery, because the divorce has not taken place on lawful grounds. Only when there is sexual immorality, is it lawful to seek divorce. At another time, Yahushua says that whoever divorces his wife for another reason than sexual immorality makes her commit adultery! (Matthew 5:32)
Nowhere in the Bible do we read about one woman having more than one husband. But it was quite common in the culture at the time of the Old Testament for a man to have several wives. Abraham had two wives (Genesis 16:3), Jacob four (Genesis 30), king David a good number (2 Samuel 5:13) and his son Solomon even a thousand (1 Kings 11:3)! We do not read about God condemning these men for taking more than one wife. But we do read in each story of all the unhappiness in these families that had its cause in polygamy.
There is one woman in the Bible who had more than a couple of men: the Samaritan woman (John 4:1-42, especially verses 16-18). But nothing in the text indicates that she had these men simultaneously; she had probably divorced five times and lived together with the sixth man without bothering to get married. Yahushua does not actually tell her that this is wrong, but we know from his teaching on this subject that He certainly did not approve. It is safe to assume that the life of this woman changed drastically after she got to know Yahushua as the Messiah (John 4:39).
Is it possible for a woman, or a man, to get married again after having divorced? From what Yahushua says about this topic in Matthew 5:32 we know that divorce is only allowed in case the spouse has been unfaithful. So remarriage after divorce is possible only when the divorce took place because of unfaithfulness of the spouse. Otherwise, you commit adultery and you make the person who marries you, commit adultery as well: ‘But I say to you that everyone who divorces his wife, except on the ground of sexual immorality, makes her commit adultery, and whoever marries a divorced woman commits adultery’(Matthew 5:32).
Why is Yahushua so strict? Because marriage, between a man and woman, reflects the union of Christ and the church. Christ is the head of the church and the church is his bride (Ephesians 5:25-32). He will never be unfaithful to her. It is a holy union. Likewise the union between a married man and woman is holy.
Marriage is a wonderful gift of God that allows us to enjoy sex within the safe boundaries God Himself set up. And when husband and wife are faithful to each other, it is a wonderful picture of the relationship between Christ and the church.