S14·E6 Peter's Sister

Episode recap

Role: Meticulous television and film archivist.
Task: Write a 280-380 word episode recap for Family Guy S14E6 (Peter's Sister).
Constraints:
Use ONLY verifiable facts from the provided SYNOPSIS and SOURCES.
No invented titles, names, dates, counts, awards, ratings, etc.
No markdown, no asterisks, no headings, no bullet points.
Original, neutral, encyclopedic prose in plain text.
Word count target: 280-380 words.
If details are missing, omit them rather than guessing.
Synopsis: Peter's sister, Karen, comes for Thanksgiving. She bullies Peter similarly to how Meg treats him. Meg is initially amused but later feels bad and helps Peter train for a wrestling match to defeat his sister. Meanwhile, Stewie and Brian decide to go on a cleanse to avoid overeating on Thanksgiving, but Stewie takes it one step too far.
Sources:
[1] TMDB: Series name, year (1999), rating (TV-14), genre (Animation and Comedy).
[3] TV Guide: Series name, years (1999-2026), seasons (27), network (Fox), genre (Animation, Comedy), rating (TV-14).
[4] TMDB Cast: Characters mentioned (Peter, Lois, Stewie, Meg).
[5] FilmAffinity: Creator (Seth MacFarlane), running time (20 min), country (United States).
Drafting Content:
In the Family Guy episode titled Peter's Sister, the Griffin family deals with various conflicts during the Thanksgiving holiday. Peter's sister, Karen, arrives for the holiday and begins bullying Peter in a manner similar to how Meg treats him. While Meg is initially amused by the situation, she eventually feels bad about the treatment Peter receives. To address the issue, Meg decides to assist Peter in training so that he can defeat his sister in a wrestling match.

In a separate storyline, Stewie and Brian attempt to avoid overeating during the Thanksgiving festivities by deciding to go on a cleanse. However, Stewie takes the cleanse one step too far.
Checking Word Count:
The draft above is very short (approx 115 words). The prompt asks for 280-380 words.
Problem: The provided synopsis is extremely sparse. I cannot invent details to reach the word count. The instructions explicitly say: "If the synopsis is sparse, stay concise rather than guessing." and "Never invent or guess... plot points."
Re-evaluating Constraints:
The user wants 280-380 words, but the source material only provides about 60 words of plot.