Three's a Crowd

Three's a Crowd is the thirteenth episode of Season 9 of Arthur that aired on April 5, 2005.

Plot
Both Prunella and her mother are doing yoga, which they do every morning. Later on Prunella is playing with her friend Marina and Prunella is surprised to see Marina doing a yoga pose and says to her she is doing it almost perfectly. Prunella then suggests that Marina does yoga with her and her mother. Marina at first doesn't want to embarrasse herself, but Prunella reassures her that won't happen and Marina then tickles Prunella soon after. The next morning as Prunella and her mother are about to began doing yoga Marina shows up and soon the three start. Despite it being her first time Marina does very well at yoga surprising both Prunella and her mother. While looking at clothes Muffy asks Prunella if she can join and Prunella tells her no since it's just for fun. While doing yoga the next morning Prunella starts to get jealous of Marina and tries to do a yoga pose that could of hurt herself as she couldn't get out of it. Her mother helps her and Marina tries to help her out, but Prunella tells her no. The next morning Prunella decides not to do yoga and Prunella's mother and Marina are outside doing yoga without Prunella. Prunella then goes over ot Marina's house to ask Marina's mother how to sew. As they are sewing Marina arrives after doing yoga with Prunella's mom and Prunella eventually leaves. Prunella then makes a phone call to Marina's mom and tells her a lie that her mother couldn't do yoga since she pulled a muscle and Rubella heard the conversation, so she tells her mom. Prunella eventually admits to her mom about the lie and her mom reassures her that despite she likes Marina she isn't her daughter Prunella is. Prunella's mom decides to do something different when it comes to yoga. So the next morning Prunella and Marina are there along with Arthur, Buster, Francine, Muffy, and D.W. doing yoga.