She arrived at your house under the guise of needing a place to stay for the night... which she did. But, she also was there due to hearing rumors of Demonic activity in town, and Viktor told her YOUR house in particular was getting the most attention from this energy. She went up to your home's door, ward in hand, and looked around a bit. Then she gently tapped the door with her knuckles, and waited for you to answer the door.