Wilma’s mother, Mrs Slaghoople, comes to greet her daughter since she learns she is pregnant. Fred must repeat himself that “he loves his mother-in-law” in order not to get into a fight with her. However, in the meanwhile, Fred must find a way to get money to purchase a crib for the baby. Barney suggests to take a part-time job as a cab driver. Seeing his son-in-law leaving for the evening, Mrs. Slaghoople suspects Fred of fooling around instead of taking care of Wilma. She happens to take a cab in which a disguised Fred is on the wheels…
