The keyword is a hybrid language search query. After breaking it down, we find the user wants the Spanish translation of a Japanese phrase meaning "sleeping over with a relative's child."

El/la hijo/a de (en este contexto suele referirse a una chica). to (と): Con.

Alojarse, pasar la noche o quedarse a dormir. Dakara (だから): Por eso / Debido a / Porque. Guía Informativa sobre el Contenido

Why is this specific phrase searched so often? It stems from a popular narrative trope in Japanese media known as the arc.