Here are some sentences from the prologue of a novel. Write what happens after these sentences:

# Mother of Learning - Prologue. NAME_1, Brother!

NAME_2's eyes abruptly shot open as a sharp pain erupted from his stomach. His whole body convulsed, buckling against the object that fell on him, and suddenly he was wide awake, not a trace of drowsiness in his mind.
"NAME_1, brother!" an annoyingly cheerful voice sounded right on top of him. "Morning, morning, MORNING!"
NAME_2 glared at his little sister, but she just smiled back at him cheekily, still sprawled across his stomach. She was humming to herself in obvious satisfaction, kicking her feet playfully in the air as she studied the giant world map NAME_2 had tacked to the wall next to his bed. Or rather, pretended to study – NAME_2 could see her watching him intently out of the corner of her eyes for a reaction. Respond with at most 600 words.
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