The Mistress and the Maids
S1:E2
1971
IMDb
June 1904: An artist, commissioned to paint Lady Marjorie's portrait, takes a shine to Sarah and convinces her to pose for him. The painting, depicting Sarah and her roommate, is a bit racy, and when the Bellamy's see it in a public exhibit, they fire both girls for what they wrongly conclude is "questionable behaviour."