The story revolves around Emily, a Scottish girl who has always known she's adopted. She discovers a woman, Gladys, who looks like her and lives next door. As Emily tries to get to know Gladys, her parents become increasingly hostile towards Gladys. Emily eventually learns the truth: her biological mother was her adoptive mother's sister, who died after giving birth. Her adoptive mother had promised to keep the truth from Emily. Gladys, it turns out, had a daughter who looked like Emily and died in an accident. Gladys tried to stay away from Emily but couldn't, and was seeking to adopt her. Emily comes to accept and love both her adoptive mother and Gladys, and finds closure in knowing the truth about her family.
Here are the key facts extracted from the text:
1. Emily is a triplet, but she looks different from her sisters, Daisy and Rose.
2. Emily's parents are liars, and she suspects that she is adopted.
3. Emily's parents told her that she is not adopted, but she doesn't believe them.
4. A woman named Gladys moves in next door, and Emily discovers that Gladys looks like her.
5. Emily's parents tell her to stay away from Gladys.
6. Emily meets Gladys at school, where Gladys is the librarian.
7. Emily's parents warn her to stay away from Gladys, threatening to get a restraining order.
8. Emily sneaks out to visit Gladys, who reveals that she was considering adopting Emily.
9. Emily's mom and Gladys get into a fight, and Emily intervenes.
10. Emily's mom and Gladys reveal that Emily's real mom is actually her mom's sister, who passed away.
11. Gladys reveals that she had a daughter who looked like Emily, but she died in an accident.
12. Emily decides to accept her mom and Gladys as her mothers, and they all share a loving moment.