Espiando Bajo La Falda De Mi Prima: Better

—¿Estás espiando a papá por fin? —gruñí, medio en broma. —No digas tonterías —ordenó, pero su voz tembló—. Mañana todo cambia. Anda, vete.

I should include some technical details to make the espionage believable, like a tracking device or a communicator. The resolution could involve the cousin saving the day and the protagonist learning to keep secrets. Need to ensure the story has a clear beginning, middle, and end. Also, keep the language in Spanish, but since the user provided the title in Spanish and the prompt in English, maybe they want the story in English with a Spanish title. Let me confirm that. espiando bajo la falda de mi prima

Nota: Esta historia es ficticia y tiene fines recreativos. No incluye contenido inapropiado. —¿Estás espiando a papá por fin

Check for grammar and coherence. Ensure the plot flows logically. Maybe include a twist where the cousin is actually stopping a threat, showing her heroism. The protagonist can help without being in too much danger. End with appreciation for the cousin's bravery. Alright, let's put it all together. Mañana todo cambia