Early on Nancy is in a limo and a man with long hair tells her to get drugs. While he's talking his hand goes from resting on his chin to resting on the armrest instantly.
When Sid and Nancy visit her family, Nancy's grandparents pick them up. They go back to someone's house and there are 2 boys and a girl there. In reality, Sid and Nancy visited her family one time. Nancy's mother picked them up. Her grandmother was dead at the time. At her family's house, it was Sid and Nancy, her mother and father, and her brother David, and her sister Suzy.