she would've been the product of a short-lived summer romance either between eoinn's 6th and 7th years, or some summer after that, depending on exactly what age you decide to go with. her mother was a muggle, told eoinn when she had turned one, and then they tried to make their weird family work for about a year before eoinn came clean about being a wizard. she bailed, leaving the daughter behind, shortly after. eoinn is pretty ambitious and driven and really focused on his career, so she would have grown up with eoinn's parents a lot, and their relationship would have likely been more friendly than father/daughter, but they got substantially closer once she was older. i can give you more details about the rest of their family if any of that piques your interest.