Sir? Scorpius couldn't remember the last time anyone addressed him as a sir. It was what old people did to be polite, and younger people did to be condescending prats. The woman didn't look fogey old, but she wasn't young either. Looks didn't always reflect maturity, however.
"Sorry, but you've been here the whole time," Scorpius said, not sounding apologetic for his rudeness in the slightest. "Will you move?" There, he'd asked.