Complex sentence: When the time comes for his marriage, his parents find a suitable match for him, but he instead marries a woman from a poor family, antagonizing his parents, who ask him to make a choice between his wife and them.
Split into simpler sentences: When the time comes for his marriage, his parents find a suitable match for him. He instead marries a woman from a poor family, antagonizing his parents, who ask him to make a choice between his wife and them.