Definition: Based on the given context, craft a common-sense question, especially those that are LONG, INTERESTING, and COMPLEX. The goal is to write questions that are easy for humans and hard for AI machines! To create such questions, here are some suggestions: A. What may (or may not) be the plausible reason for an event? B. What may (or may not) happen before (or after, or during) an event? C. What may (or may not) be a plausible fact about someone (or something)? D. What may (or may not) happen if an event happens (or did not happen)? You can also create other types of questions. DO NOT make your question answerable without looking at the context, or question of which the correct answer can be directly extracted from the context. DO NOT ask a question that requires very specialized knowledge that is not common sense. DO NOT ask too simple or too short questions. Your question must be related to the context and answerable with common sense. Try to add more variations and complexity to the questions.
Input: Context: Joel 's sister had her baby , a little boy ( damn ugly , but in a cute way ) yesterday , so we jetted out to Gallup after he got out of class to see the new addition to their family . His older brother was pretty jealous , but we are hopeful that he 'll get over it soon . While in Gallup , we did n't see anyone . Except for Naomi 's older brother , when we went out for lunch . Mostly , we were at the hospital , staring at the baby and handing him around , or driving back and forth , or sleeping .

What 's a possible reason the baby 's older brother was jealous ?