Answer: The conflict that develops for the engaged couple in the story "Marriage is a Private Affair" is "Nnaemeka's father objects to their marriage".
Step-by-step explanation: "Marriage is a Private Affair" is a short story written by Chinua Achebe. The main conflict is the story is the objection of Nnaemeka's father to the marriage between his son and Nene. Nnaemeka's father is against their marriage because he has already chosen another woman for his son and because Nene is not a member of the Ibo tribe. Moreover, he gets even angrier when he finds out that Nene is a schoolteacher, a profession that, according to him, the Bible prohibits for women. This leads Nnaemeka's father to believe that their marriage has been plotted by the devil.