The Roommate

When the daughter of Lester's friend comes to stay with the Jenkins until the dorms at Howard University open, she gets a taste of the big city first hand. Sandra is behind on rent for three months and she decides to get a roommate.
Sweet, shy, quiet Donna becomes her roommate after the dorm overbooked. She takes a lesson from Sandra and begins dressing, walking, talking, and acting like her.
She steals Sandra's boyfriend and when Mary talks to her about the new Donna, she gets upset and leaves. Then her parents show up to check on their ""baby."" Mary stalls until finally Donna comes back. They talk privately and Donna apologizes and admits that she was not ready for ""life in the fast lane.""

Next episode

S03E18 - The Big Deal