Make them share

A blush of heady heat and desire crashed over Jessica's mind. With a hand she pushed herself off the silver cock beast, which growled lightly at the lost as it spotted its rival now. With a hand, Jessica continued to pump its weird metalic cock, which throbbed with need. Jessica pulled her hips away from the second beast, dropping into a crouch, and began to pump its cock too, inviting it closer. It did so, but gripped Jessica's head and pulled her to its red cock, pressing the cock head to her lips. The situation quickly leaving her control, the first beast pulled her hips upright once more, too forcefully for Jessica to prevent. Helpless, Jessica felt both cocks pierce her at once, bulging her throat and quim. Roiling with the rush of pain and sensation, as the cocks made use of her.
The beasts had some kind of canny, building a collective tempo. She was first pulled over the normal cock in her mouth. Its greasy flavor dominating her sense of smell and taste as it's new grip cupped her breasts, squeezing the mounds hard as her nose met it straggly pubic hair and budged into her throat. Breath unavailable to her as her gagged on the invader. Then the hot rough hands, with fingers digging into her inner thighs, would pull her back onto the silver cock, its length stretching her out not-unpleasantly. Its strange texture stimulating her differently with every thrust. And an undeniable heat quickly building in her.
Soon she had ovaled her mouth over the cock being fed into her, teasing its underside with her tongue as her moans vibrated it. Her saliva doused the thing, dripping to the floor. She thrust back against the cock behind her, as something big built in her, she could feel her hot juices run down her leg as the silver cock began to throb. With refreshed violence, the silver cocked beast pounded Jessica over and over, the cock growing larger and larger within Jessica, pushing her over the invisible edge of pleasure as her body began to seize, she wrapped her legs around the as agonizing spasms of pleasure destroyed her mind. She didn't even notice the beast came down her throat. The beast behind her let out a strange gargled cry and Jessica was dropped harshly to the ground.
A mixture of pleasure and horror went though Jessica as she still felt filled by the silver thing's cock, and still helpless in her orgasm, as she felt its pliant flesh grip groin like rough tendrils, as it continued to pump into her. She felt it go deeper than any questing intruder had pressed int her before, giving her a profound sense of fullness. One tendril had found her neglected clit with its grip, and pulled and teased and thrumed at it. It was all too much for the bewildered Jessica, her body seized again, crossing her legs tight against the intruder, seeking, but not finding a body to pull tight against. Her walls milked the intruder, which finally gave way, and Jessica felt massive throb go through the thing before a hot liquid pressure pored into her womb, leaving a tingling sensation that redoubled her plateau of pleasure, destroying any remaining will she had left, leaving her floating in electric pleasure and euphoric spasms.

Jessica laid on the cobblestone, as the combined fluids dripped back out, the silver cock extracted its diminished form from her, and slid back over to its owner, its strange purpose fulfilled.