A Hunter's life

Emma is a hunter. It's the life she grew up in. Her mother was killed when she was 2 leaving her and her dad alone in the world to fight against the monsters. For a while they had a good system. Emma's dad would go hunt, leaving Emma alone in their apartment to go to school and help him on cases through the phone. She had a hunter's life but it was good. That is until one night when Emma was 12, she was sleeping and she heard a scream. She ran into her dad's room with a gun to find him gutted and lying on the floor. Killed by a shapeshifter. She had immediately shot it with silver, killing it. But that didn't help her. On that night she ran, taking what she could, using her skills her father had taught her to survive. She successful did, working monster case after monster case, doing some school online, running into hunters. Her life is now basically a normal hunter's life. When she's 16, working a small witches case, she bumps into some famous hunters. Who could've known that she bumped into Sam and Dean Winchester? Who would've known that after some convincing from Sam they let her tag along? But let's not get ahead of ourselves. No, let's go back to before Emma's life went to hell. Before she met the Winchesters. And before her life turned into a massive rollercoaster that couldn't be undone. Not that she would've wanted it to...