I'm not sure specifically as I haven't read it. But it could be about a secret that a sister has been keeping, perhaps something related to family, her own personal life, or a past event.
I'm not sure specifically as the title is rather ambiguous. It could be about a secret that a sister has been keeping, perhaps a family secret, a personal secret like a hidden talent or a past event that she hasn't shared with others.
The real story could involve family drama, personal struggles, or even a long-kept promise. Maybe the sister is protecting someone or has a hidden talent she's afraid to reveal. The possibilities are endless.
I don't know for sure. But I assume the sister is one of the main characters. There might also be other family members like her parents, brothers, or other sisters who could be important in the story since it's about a sister's secret.
It could be about a long - held family secret. Maybe she has a hidden talent that she's kept from the family all her life, like being an amazing painter but was too shy to show it. Or perhaps it's a story of a past love that she never told anyone in the family due to some reasons.
It could involve a secret friendship. She might have befriended someone who was considered an outcast in society, and she didn't want her family to know because of the potential judgment. So she maintained this friendship in secret throughout her life.
Maybe a sister had a secret talent for painting all her life. She hid her paintings in the attic and never showed them to anyone because she was shy and lacked confidence in her work. One day, by accident, her family discovered them and were amazed at her hidden ability.