Disclaimer: I don't own any of the characters from Teen Wolf they belong to their creator. I own Emily Lahey and anything/anyone else you don't recognise.
The Story of Us
Chapter 01: A Brief History
Emily Lahey (August 13, 1982) - Peter Hale (October 26, 1976)
Older sister of Camden and Isaac Lahey. Legal guardian of Isaac until he turns 25. Emily hasn't always lived in Beacon Hills, she may have grown up there but she moved away when she was 24, coming back every few months to visit her younger brothers and then comatose boyfriend. Emily also wasn't entirely human.
1988 - 1998
Emily Lahey met the Hales when she was six years old, at that was the day that Laura Hale became her best-friend. Peter, Laura's uncle was twelve years old, and her little brother Derek was one. Emily became a permanent fixture in their lives.
By the age of seven Emily had lost most of her hearing in her right ear with moderate-severe hearing loss requiring her to wear a hearing aid. By the age of fifteen she had moderate hearing loss in her left ear so she started to wear two hearing aids. She was able to read lips but it often left her tired and didn't stop her from talking. She'd also learnt sign language with her mother and as a result showed Laura, Derek, Camden and Isaac how to sign. Her father never bothered to learn how.
Between 1987 and 1998 Emily and Laura both gained two younger siblings - Emily gained two little brothers - Camden in 1987 and Isaac in 1994; while Laura gained Derek in 1987 and Cora in 1994.
1998-2002
Emily and Laura dated for four years from ages sixteen to twenty. Laura was the one who ended things with Emily, she could see the attraction that Peter saw. Peter was the one who initiated the first move.
2003-2011
Emily and Peter seeing each other two months after her twenty-first birthday, over a year after she and Laura ended things. Emily stayed while Peter was in a coma for six years, she couldn't end things while when he had no say. Emily stopped things when Peter killed Laura and became the alpha. She couldn't deal. When Derek killed Peter, Emily felt the shift in dynamics and knew that she had to go back to Beacon Hills again. Isaac hadn't remembered Emily dating Peter when he was a child, and she'd left in 2006 after the fire.
2012-
Emily reignited her relationship with Peter after he was sent to Eichen House. Derek knew that he couldn't stop her, and she was the only one that he trusted that could somehow get through to his Uncle. When the Ghost Riders appeared, she was in France with Isaac.
2014-2015
Peter and Derek started to build an apartment building for supernatural creatures. September 2015 Peter went missing after a late night stroll in the preserve. He'd gone for a walk to think about what to get Emily for the anniversary of their first date all those years earlier.
October, 2016
Peter turns up after being missing for almost a year; and Stiles started losing his hearing four months before Peter was found. Due to Stiles' proximity to Lydia's Banshee scream he'd developed moderate-severe Sensorineural Hearing Loss in both his ears.
More on all of this as the story goes on.