What happened while Mary was reading the book Charlotte's Web while staying home sick from school?

While Mary was staying home sick from school, Charlie had asked a random man she met at the bar to stay in her home and monitor Mary. While Mary was reading Charlotte's Web, she became so excited by the story that she invited her babysitter into her room to discuss the characters. While he was there, the babysitter pushed himself into Mary's mouth and forced her to perform oral sex on him until she vomited.