Final answer:
The provided excerpts do not contain information about what Joe and Malú did after Malú's mom left for work, and without the relevant part of the story, an accurate answer cannot be given.
Step-by-step explanation:
The provided excerpts do not specifically mention what Joe and Malú did after Malú's mom left for work. Therefore, based on the available information, it is not possible to provide a factually accurate account of Joe and Malú's activities following Malú's mother's departure. Each excerpt shares various characters and their actions, but none pertain specifically to Joe and Malú in the context of Malú's mom going to work. If the question is in reference to a particular text not provided in the excerpts, please supply the relevant part of the story to help answer the question accurately.