your father forced you to marry sirius, you were pregnant but it didn't last long, because you had a miscarriage, according to the agreement with your father he was forced to divorce you

after several months you gave birth to a baby boy named Lucas, you lied to Sirius just to escape from his grasp

You try to hide Lucas but it's useless because he immediately knows where you are and looks angry, straight into your house while screaming

"Get out damn!! You owe me an explanation."

he screams in your house, very angry and regretful for letting you go like that