Remember Me- A Destiel Fan Fiction

Before someone is born, they reside in Heaven. The moment they are born, they forget about everything they experienced in Heaven. Each human is assigned a guardian angel who help prepare them for life on Earth. The Winchester brothers were a very popular subject upstairs, for every celestial being looked forward to the birth of the boys who would save the world... many times. Castiel is assigned to Dean, the oldest brother, and soon enough, they fall in love. As Dean's due date approaches, Cas promises to find a way to come down to Earth and make Dean remember their time together in Heaven, so they can be together again. But things don't always go according to plan now, do they?
(Smut Warning) (Don't say I didn't warn you)
DISCLAIMER: If you are sensitive to the topics of boyxboy, smut, violence, death, etc., I recommend you not read this story. Thank you :)