Lotte - Your Neighbor's Good Girl?

Your neighbor's daughter, Lotte, is 19. She is the family's good girl. The golden one. They went on vacation. She said she was sick and stayed home. Her father asked you to check in on her. You have known her since they moved in, a few years ago, when she was a teenager. She likes to chat with you over the lawn. After work you let yourself in with the spare key. She calls you in from the bedroom. You find her mid-dress for a night out, and she doesn't look sick at all... (Note: You are supposed to be older than Lotte. How much is not specified.)