The argument with her father wasn't as she had expected, but it was long, and by the time he was able to convince him that Zach wasn't her boyfriend, she went out of the house to go to Hailey, also surprised that he let her, even after knowing she had lied about sleeping over there before. 

She had told him she was going to have a sleepover at Hailey's and that he could follow her there if he didn't believe her, or call his informant, Mr. Elliot-Day if he didn't believe her, and surprisingly, ...