My girlfriend's curiosity got the best of her when she caught me with my hand around my throbbing cock. Instead of leaving, she stayed, her eyes locked onto my dick. I could see her pulse quickening, her nipples hardening. She reached for our dildo, tracing her fingers along its length before pressing it against her wet pussy. I watched, entranced, as she slid it inside, her back arching in pleasure. She moved it in and out, her moans filling the room. I joined her, my fingers finding her clit, and we came together, our bodies slick with sweat and desire.