You aren't afforded long to gawk before the reptile drops to a squat in front of you, reaching to the small of your back to snap the rawhide lashing you in place.
"Mmm..." he rumbles, "I bet you're nice and tight."
One of his massive paws wraps around your shoulder, pulling you forwards and tossing you into the dirt, and you feel his substantial weight pushing down on you moments later. His claw spreads across your shoulderblades, flattening your chest to the ground and keeping you in place, limiting your ability to breathe. You can hear him shifting about behind you, see him moving out the corner of your eye, and feel something hot and slick leaking down the small of your back. Gobs of slimy precum ooze down onto your skin, pattering onto the small of your back and your ass as his fat cock throbs and hardens.
"Let's find out," he growls, leaning down to lick up your neck with his long, rough tongue. You feel his thick, hot shaft start hotdogging between your cheeks, his massive, muscly form kneeling between your thighs. Your crack glistens with precum as his cockhead starts nudging at your hole. He doesn't waste time lining his dick up, and with a steady push of his powerful hips, plumbing that massive shaft into your ass. Pain shoots through you from getting so suddenly stretched, but you can't help but feel pleasure too as his cock finds all your sweet spots. Inch after inch vanishes into your rear, until you feel those heavy balls against your cheeks, his cock hilted into you.
"Oof... are you ever."
Your eyes pop wide as his hips start to rock back and forth, the slick fluid pouring into your ass allowing for some give as you're fucked into the dirt. He starts out steadily, each powerful thrust running the length of his massive cock and plowing his throbbing shaft back into your guts. But the pace soon accelerates, eliciting a grunt from the hulking lizard. He starts pounding your ass, his massive balls slapping against your rump, his breath coming in humid huffs over top of you. It doesn't take long before he's bucking rapidly and roughly into you, soon flattening himself against your ass and gushing hot cum deep inside of you. You can feel each wet, slick spurt filling up your insides, spilling out of your stretched-out asshole and soaking the crack of your ass. He slowly withdraws his throbbing, gushing dick, emptying the last of his load messily over your butt and up your back. Plumes of hot breath roll over you as he pants from the exertion, the last of his cum leaking down between your thighs.
"Nothing like filling up a snack first," he growls.
What happens next?