In the bustling CDMX metro, cousins find themselves waiting together, the tension between them palpable. As the train fills up, they're pressed together, their bodies rubbing. One cousin, intrigued by the other's growing bulge, discreetly starts to stroke it through their jeans. The other, surprised but aroused, reciprocates, their hands moving in rhythm under their jackets, hidden from the oblivious passengers. The train's sway and hum provide a steady beat for their forbidden dance.