What is the central idea of the story "Marriage Is a Private Affair"?

The central idea of the story “Marriage Is a Private Affair” reveals that choice-based marriages can prove successful, even in societies where arranged marriages are the norm, when there is love and commitment between the parties involved. Indeed love can conquer anything.
The story is based on an Ibo society, whose marriage customs require that couples are matchmade. Nnaemeka thus faces stiff opposition from his family, and village at large, about his plans to marry Nene, a woman he has met in the city of Lagos. His father Okeke is so furious that he decides to erase the memory of his son from his mind, especially after Nnaemeka marries Nene in spite of his and the clan’s objections. Okeke even bans his son from his home. Over the years, however, an undeterred Nene works hard to gain the approval of the clan. She makes friends with her husband’s village mates, who are living in the city. She even writes a letter to her father in law, begging him to reconsider their situation, as their children would really want to visit the village to see their grandfather. This letter really touches the old man’s heart. The story ends, with Okeke in a remorseful mood, thinking about his innocent grandchildren and how he just might die “without making it up to them”.