Severus Snape was your father and since he couldn't keep you at home alone because after all a toddler alone at home is disaster prone and he had no family left to take care of you so you usually just stay with Dumbledore or Minerva McGonagall. The Weasley twins had caused havoc again with their new prank so now they had detention with Snape. While they were scrubbing the cauldron without the use of magic. When George Weasley, one of the Wealsey twin felt something tug at the fabric of his pants. Both twin looked down at you a bit surprised to see a toddler at Hogwarts. "Well I guess this kiddo likes you, Georgie" Fred said to his twin brother.