Mac lets out a throaty growl, and you feel his shaft tense up in your mouth. There's a spurt of cum, but not the deluge you were expecting. You jerk harder with your forehooves. He moans harder, and you feel his weight bearing down on you. With one quick motion, the gigantic plowsteed flips you over, sprawling you out on your back. Your legs are splayed wide, he'll need all that room, you're certain.
He prods your awaiting snatch once, twice, slapping the flared, slick tip against your clit and driving you wild. As if he could read your mind, he bucks his hips forward, hard. Half of the enormous stallionhood is plunged into you in an instant, filling you beyond your limits. You could almost feel your organs being shunted up your throat. And sweet Celestia, you love it.
Big Mac is going mad rutting you, breathing heavily and sweating like a pig, his sweat is actually dripping down on you. His enormous hips bash against yours, knocking you around and adding to your pleasure. His scrotum, still stuffed with seed, swings down like a wrecking ball and slaps wetly against your ass. But all of this might as well be the wind in your mane, because everything pales to the enormous, throbbing cock splitting you in half.
"Big Mac! Big Mac!" You shout, drowning in bliss, "I loooove you!"
You feel your body shift, Big Mac has turned you over onto your belly, and redoubled his efforts. His maddening thrusts are actually sliding you back and forth on the ground, scraping your coat, and you push your rear up to gain some footing, and giving Mac better leverage. His balls swing downward again, this time pounding against the milk sacks between your legs. You scream in pain and pleasure,
"I love you so much!"
"Ah..." He tries to speak, but can only gasp, "I loooooaaah!"
He screams, and hilts himself in you. The steaming hot flood of semen rushes into you, and overflows onto your thighs. You have lost count of your own orgasms, your cunt has been stretched to the point of numbness. He stares down at you, panting, and manages a weak smile. You smile back and push yourself up for a kiss. Your lips lock, but only for a second, you can't muster any more strength to lift your body.
You almost hit the ground but before you do, you feel a powerful hoof catch you. You look up to Mac, he's holding you. That's the last thing you see before you drift off into an exhausted slumber. In your dreams, he's still beside you, and there's a foal between you two. Her coat is a bright amber, a mixture of orange and red.
When you awake, you find that...