1:1] In the name of GOD, Most Gracious, Most Merciful
[23:5] And they maintain their chastity.
[23:6] Only with their spouses, or those who are rightfully theirs, do they have sexual relations; they are not to be blamed.
Free intercourse is not permissible in Islam. According to the Quran, the believers shall maintain their chastity. They shall have relations only with their spouses or what is legally theirs. The believing men and women are allies of one another, and they can be true spouses in the context of the Quran. However, a believer may have an existing marriage that may not be in accordance with the Quranic law. Yet this marriage can also be considered lawful or legal.
[4:3] If you deem it best for the orphans, you may marry their mothers – you may marry two, three, or four. If you fear lest you become unfair, then you shall be content with only one, or with what you already have. Additionally, you are thus more likely to avoid financial hardship.
[4:24] Also prohibited are the women who are already married, unless they flee their disbelieving husbands who are at war with you. These are GOD’s commandments to you. All other categories are permitted for you in marriage, so long as you pay them their due dowries. You shall maintain your morality by not committing adultery. Thus, whoever you like among them, you shall pay them the dowry decreed for them. You commit no error by mutually agreeing to any adjustments to the dowry. GOD is Omniscient, Most Wise.

