Question: When Grey questions Walker about calling children services, why did she keep asking Walker if he did call them? Grey wanted a yes or no from him but, every answer Walker gave was pretty much his way of saying yes.
Question: Why did Bill say he wasn't Curly Sue's dad if he slept with her mum?
Answer: He said so himself, "Some get VD from a one-night stand, I got a kid." In a movie, Cinderella Liberty, James Caan got involved with a woman, Marsha Mason, who had a 12-year-old son and a baby on the way.
Answer: Just because they slept together doesn't mean he's the father. She was likely already born by the time he met her mother.
Question: Who was the man in the office that was on the phone when Grey barged in, and why did she bring up lingerie?
Answer: He's the husband of the woman Grey was representing in her introductory scene. She brought up lingerie because she had incriminating photos of him unclothed whilst having an affair.
Answer: He knew if he said, no, it would have been a lie. He tried to answer in a way that would not make him sound like a villain.