Beneath the twinkling lights of the Christmas tree, primita and primo exchange more than just presents. As their families sing "Las Campanas de Belén," the teens sneak away, drawn to each other like magnets. In the quiet of the guest room, they undress, their bodies flushed with excitement. He runs his hands over her soft skin, cupping her small breasts, while she strokes his hardening cock. She guides him inside her, gasping at the new sensation. They move together, their moans drowned out by the carols, until they collapse, spent and breathless, in each other's arms.