"Take me from the back big boy."

I heard some shuffling in the dirt after Hannah uttered those painfully lustful words. The stranger was positioning himself behind my wife; he was going to fuck her on the ground. "Unf" I heard her grunting, my hand now gently handling my erection. He was inside her.

I heard more grunting from my bride, and the stranger said, "Ah, you love my big cock stretching out you married pussy don't you?"

"Yes," Hannah said, then she urged him "Fuck me harder."

Soon I heard the slapping of flesh and the pace of the grunting and moaning quickened. I dared a peek around the corner then. Though both the lovers were facing me, both had their eyes closed tightly, faces contorted in ecstasy. The man was thrusting rapidly into Hannah's pussy, making my cheating wife's grunting become more akin to a squealing noise. As he fucked her, Hannah's naked tits bounced at me mockingly. By now I was gripping my bell-end tightly. I squeezed my cock head with fright and ducked back behind the corner as I saw her eyes flickering open. I don't think she saw me.

I imagine she turned her head to gaze lustfully over her shoulder at the stranger as she encouraged him, "Yes, that's it. Fuck me. Fuck me; don't stop." With renewed vigor, I heard flesh smacking, and some louder slaps that indicated that he was spanking my wife hard on her ass.

I peeked around the corner for just a moment, squeezing my cock without stimulating it enough to ejaculate. I glimpsed the stranger's hand now planted between Hannah's ass cheeks, his thumb approximately located on her asshole. I heard a new pitch in my wife's musical moaning, an agonizing choral accompaniment to my gut-wrenching masochistic lust. Hiding behind the corner, my breath quickened, and I felt almost overwhelmed with the temptation to finish myself, but I somehow mustered the will-power to hold off.

I peeked around the corner again out of curiosity when I heard my wife's moaning take a muffled tone. When I looked to see them, my wife was still getting drilled from behind by the stranger with his thumb against her ass, but she was resting on her elbows in the dirt with two fingers sucked deep into her mouth. She slobbered on her fingers, one of which wore her wedding band, as the stranger roughly fucked her into them. Soon she lifted herself up by her non-slobbery hand and gazed back at the stranger who stared into her eyes lustfully, oblivious to her husband watching from the bushes only meters away. She inserted one of the fingers into her ass, and after a few seconds, the other.

"Oh god" she moaned to the stranger. "I want you. In my ass."

I couldn't hold off any longer, and I ducked around the corner to furiously, nearly whimpering with lust, pull my penis until I erupted hot spunk all over the dirt next to me, some of it landing on an old condom wrapper. When I went over the edge, I became absorbed in the act, and was unaware of what was happening between the stranger and my lying wife. When I regained my composure, I peeked around the corner to see the source of the loud grunting and moaning that had reentered my awareness.