Complex sentence: If an owner found that his male slave was having a sexual relationship with a free woman, by law he had to warn the couple three times to break it off; if the affair continued, he had the right to take ownership of the woman.
Split into simpler sentences: If an owner found that his male slave was having a sexual relationship with a free woman, the law required that he warn the couple three times to break it off. If the affair continued, he had the right to take ownership of the woman.