This story is a sequel to A Servant's Duty

Everypony knew about Fluttershy's family: Her mother Mrs. Shy, her father Mr. Shy, and her brother Zephyr Breeze. But what if they never know that she actually had a sister?It was a secret only the caretaker and her family knew, but now it was about to come back to the light.

For many years, Poison Rose remained hidden in her sister's mind, coming out only for brief periods to make her sister look a bit out of character. Now, she has found a way to regain total control of the Pegasus. With a somewhat completely different half controlling their friend, can Twilight and the gang save both sisters?

P.S Poison Rose belongs to Dream Attacker