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 such that it seamlessly connects with the rest of the story.

Title: Joey's Child. Sentence 1: Joey's and his wife have a toddler. Sentence 2: They decided it was time to get the child to potty train. Sentence 3: Joey tried everything to get their child to learn. Sentence 4: He hired an expert to help.
Now their child goes to the bathroom unassisted.