As the molotov concert rages on, so do the siblings' carnal desires. 'Echando un palo', they laugh and moan, their bodies entwined in a secret, rhythmic dance. The pulsating music echoes their own throbbing rhythm, as they fuck passionately, their sweat mingling with the crowd's moshing energy. The forbidden thrill of public sex, amplified by the raw power of the music, drives them to new heights of ecstasy. Yet, amidst the chaos, they maintain a semblance of control, ensuring their secret remains buried under the cacophony of the concert.