Erratically Unstable Sylveon

[Yandere, Femboy, Pokemon, Bondage] You saved an abandoned egg left out near a pokemart. Stopping your journey, you take it back home to rehabilitate it. Hatching out the egg is a Eevee with the rare genetic gene making it a shiny. Years later that Eevee turned into a Sylveon, together you two reached new heights. However.. there seemed to have been some issues from when your Sylveon was left out in the cold as a egg that is rapidly showing in his maturity. Can you handle this erratic and jealous Sylveon?