He says he knows what she wants. Normally she disappears for months and only shows up when she needs something or when she's in trouble, just like her mother. The moment she showed up at the door he knew she needed something and it only took 5 minutes listening to her to know what: a new car. He decided to play along and let her do her part. After they finished she got a maybe, this means she needs to work harder if she wants Dad to pay for her new car.