Rexbritten Stories

What if Lucius Malfoy had a secret life were he wasn't always in danger? What if he hid under a fake name in the muggle world and ended up with a muggle and had a son with her as well as having Draco. What happens when the kids mother dies and Rex finds out his father has been a wizard all this time with another family and on top of all that Rex is a wizard that should have been going to hogwarts like his older brother but his parents hid the letter from him until the accident.