In the sultry, dimly lit room, Gustavo and Marta set the stage for a unique, kinky adventure. The man's cock, already semi-hard, is the focus of their intense, mutual exploration. Marta's delicate fingers trace the length, her eyes gleaming with curiosity and desire as she measures and marks each inch. The man's groans fill the room, his cock pulsing in her hand as she brings him closer to the edge. Marta's own body responds, her nipples hardening, her pussy growing wetter with each measurement. The final mark is made just as he can't hold back any longer, his cock throbbing as he releases, his cum painting the room with their shared, intense pleasure.