Baby Makes Three is the 18th episode of Sabrina's Secret Life.
Whilst Hilda and Zelda are off to the "Netherworld Beauty Spa", Sabrina hosts a secret party at her house. But a babysitter by the name of Ms Pratt comes to babysit Sabrina before her guests arrive. Salem comes up with a plan: he distracts Ms Pratt while Sabrina searches for her aunts' spell book to make Ms Pratt young. Thinking that Ms Pratt is eighty, Sabrina adds six times the ingredients, hoping to make her twenty. But she isn't as old as Sabrina thinks. When she casts the spell, Ms Pratt turns into a baby, just as Maritza comes in. They both tend to Ms Pratt and go to a store to buy baby-supplies in a baby carriage Salem transformed from a pumpkin. He then finds out that the transformation will end soon, and rushes to tell Sabrina. He catches up with her and Maritza just as they leave the store and the baby carriage turns back into a pumpkin. They return home and Sabrina's guests come in. While Sabrina is warming up milk for Ms. Pratt, the lights go out and Cassandra gets suspicious. She finds Ms Pratt sleeping and goes through her bag where she finds Ms Pratt's identity card with her real picture on it. She then turns her back into an adult and leaves the party with her friends. The friends who stayed behind have a party downstairs; and Harvey notices Ms Pratt come peep into the room. When Sabrina finds out that Ms Pratt is an adult again she calls off the party to find Hilda and Zelda at home. Ms Pratt returns home, dropping off Sabrina's friends on the way.