What if Sirius Black had a kid with a muggle-born witch and was the same age as Harry? In this story Sirius Black got a muggle-born witch pregnant after a one night stand. The child was born 2 months before Harry but Sirius was taken away to Azkaban and was unable to raise him. 10 years later Harry and Sirius's son meet on the Hogwarts Express. What will become of their relationship?