The siblings' shared room becomes their playground of forbidden desires. Maria, her breath hitching, guides Alejandro's hand between her thighs, his fingers finding her wetness. Alejandro groans, his cock throbbing against Maria's stomach. He lays her down on the bed, his mouth finding her breasts, his tongue teasing her nipples. Maria moans, her back arching, her hands gripping his hair. Alejandro trails his lips down her stomach, his tongue flicking against her clit. Maria gasps, her hips bucking, her orgasm building. They switch places, Alejandro's cock sliding into Maria's warmth. They move together, their bodies slapping, their moans filling the room.