New contest entry: Corrupting Friendship: What is Love?

[Unpublished stories cannot be embedded]

Twilight is very worried.
Only a few weeks ago, her little brother Spike gained a growth spurt overnight, declaring him as an official adult.
She was happy at first, although her worries got the better of her several times, but what worried her the most was that not a week had passed when Spike started a relationship with a mare that looked twice his age.
Something put her on edge every time she looked at her, specially her deep teal eyes.
Little did she know, the mare had a secret, and a secret plan that involved her little brother, and all her friends.