Breeding The Demon Slut

She looked up at the ten foot tall hellspawn in front of her. His cock was already hardening, as long and thick as her arm. She had no choice but to do her duty as his breeding slut, gritting her teeth and whimpering as he began to force that monstrous thing into her tight little pussy. 

Gravity, brute strength, and determination helped him feed it into her, stretching her walls wide open to take him. Her taut belly bulged with the size of it, the grotesque swelling moving as he began to pump into her. She writhed and screamed in ecstasy as the demon lord pounded her without mercy, using her like the cocksleeve she was. When he exploded inside her, she felt that hot blast of demon seed spurt right into her fertile womb, gallons of it, swelling her belly even more until it looked as though the seed had already quickened.