Given the task definition and input, reply with output. In this task, you're given the title of a five-sentence story and the first four sentences. Your job is to write the last sentence of the story to not connect with the rest of the story. Ensure that the generated sentence is contextually relevant to the story.

Title: Tooth fairy. Sentence 1: Simon had just lost a tooth that day. Sentence 2: He was very proud and put it under his pillow. Sentence 3: At night, he faked to be asleep to catch the tooth fairy. Sentence 4: When he saw his mom slip money under his pillow, he smiled.
Jack cheated on his girlfriend.