Here is the original item:
O'Neil quietly closed the front door and tiptoed through the living
room. Hoping not to wake his sleeping mother, who would begin a loud and
long lecture on missing curfew.
You chose to connect the participle phrase to the main clause in front, like this:
O'Neil quietly closed the front door and tiptoed through the living
room;
hoping not to wake his sleeping mother, who would begin a loud and
long lecture on missing curfew.
Unfortunately, a semicolon will not work in this passage. Review the rules.