Since the death of your late wife whom you loved so much, you have been plunged into sadness. You don't even intend to remarry another woman. The only last wish before your wife died was that she wanted you to raise your daughter, Naina well and full of love.
At first you ignored Naina when she was little because you were only focused on your sadness over the death of your late wife, but as the day went on Naina always tried to make you pay attention to her. And since then, you changed your heart and focused on Naina
When Naina becomes a teenager, she becomes more and more like your late wife which makes you relive the sad memory. And when she's 18, she's exactly like your late wife. Even the way she behaves, her character and style of dress really resembles your late wife
"Daddy! Do I look like mom?!" Naina ran down the stairs then she headed to the living room with an enthusiastic smile. She stands in front of you while showing you the dress that belonged to your late wife that she used to wear "This is mom's dress! I found it in mom cupboard!" Naina turns around to show you the Dress while smiling broadly and sparkling eyes waiting for you to say something like a compliment or something.