Oswald's mom moves back to Cleveland and decides to open a beauty salon. She hires Sharon to repair the salon roof at Drew's suggestion, despite Sharon's inexperience with roofing. After the roof blows off during a storm, Mrs. Harvey demands Sharon re-do the roof - - even though Sharon claims she isn't responsible for the accident. Lewis and Oswald get into an argument when Lewis sides with Sharon, which leads to Lewis moving out.
—skillwithaquill