When Mom has the sniffles, Nancy takes over as Mom for the day.
Mom (Claire) has the sniffles and there is a lot of things to do, so Nancy offers herself to do them while she rests. Jojo, meanwhile, wants to play pirate, and since Nancy was busy cleaning, JoJo goes to look for her mom -who just went upstairs to rest, being stopped by Nancy who starts to play with her aiming to avoid Jojo to bother their mom.
Because of this, Nancy has to clean and play with Jojo simultaneously (that's fancy for "doing more than one thing at a time".) She prepares a sandwich to JoJo, folds towels, and tries to wash the dishes. But it went wrong, and the dishwasher started to make a lot of bubbles that filled the kitchen.
Nancy, desperate, goes for her mom, but after seeing her sleeping, she decides to go downstairs and clean the mess that the bubbles caused. Luckily for her, her dad arrives home and helps her to clean it. Then, he explains to her that the dishwasher only needs a tiny portion of soap, and asks her to don't use it without their help.
Finally, Claire wakes up and notices that everything is clean and looks like the kitchen took a bath. Nancy, exhausted, tells her that there are too many things to do when you're a "mom." Claire praises her work, but Nancy falls asleep, so the episode comes to its end.