I already posted this story, but as I see that was too short. The original version is "Casusal Sex in Winter, in a Cold Car". But now much longer and detailed. That's pretty much what happened, with a little embellishment.
A story in the Fantasy Ravishment Universe
Under six escalating red moons, a highborn woman is captured, claimed, and transformed by a brutal orc war-band. From ravishment to willing surrender, from iron rings to molten brands carved through her very heart, she becomes their pierced, squirting, eternally orgasming queen. By the final moon she is no longer human; she is the living red moon itself, a pierced and branded goddess of unending climax who births a new crimson sky from her own endless release.
A slutty wife, Sarah, who has discovered a love of cheating on her husband, with a man she hates, Derek, decides to also cheat on him after he, with no permission, invites his big cocked black friend, Marcus, to fuck Sarah. Peeved that Derek has treated her like his property Sarah decided to propose to Marcus that he and his friends can fuck her in the future without Dereks knowledge.