Harry Potter: The Slytherin Mud-Blood

Salazar Slytherin never allowed muggle-borns in his house and there has never been a muggle-born sorted in Slytherin.

Naomi Lockery grew up as a Muggle, with her father and backyard farm. Suddenly during the summer, she gets an acceptance letter from Hogwarts. This didn't surprise her father because, his brother was a wizard and he had hoped that she would be accepted. When his sister-in-law pasted away, she gave the key to her vault to Naomi so she could buy her required items. While buying her books she runs into the Weasley family and is immedeatly strucked by one of the twins, Fred Weasley. She and her father became friends with the family real quick and are ready to set off to school. As Naomi sat at the stool, with the Sorting Hat on her head, it was a shock to see that she was sorted into Slytherin!