Super (Seventeen Shifter AU)

She's friends with shifters but she doesn't know. She also come from a line of shifters. How it starts is at first both sides of her family come from a long line of shifters later on the shifters start mating humans and then the actual shifters being born in her family are few and far between. Till it gets to her great grandparents grandparents and her parents who aren't shifters even though they have shifter blood in them they themselves aren't shifters they don't even consider the possibility of their kids being shifters so she literally shifts by herself one day with no idea what's going on. She runs to her shifter friends but like I said she had no idea they were shifters. They help her through it though.