Go back and visit Loretta

You walk back in the house, shaking your head at the old man. Offering you to his daughter for her happiness is something you never expected from him. You grin widely, thinking of Loretta's nubile body next to yours. You hurry upstairs.

Quietly walking down the hall, you stop outside the sexy teenager's room. You listen at the door. You can barely make out breathing sounds.

Should you knock first or just sneak in and crawl into her bed?