You're fucked

You awaken with a jolt. Positioned around you are four robotic legs. You are too tired to roll onto your back and look at your opponent, but its enormous body blocks out the sun.

The machine takes a step back and lowers its unseen head down to your skirt, inhaling deeply. Once it has had its fill a pair of steel jaws carefully chomp down into your panties and tear them away. The head then nudges you until you pull your knees underneath your body, ass in the air.

"Just get it over with." You say.

The machines back legs bend slightly and you feel a massive lubricated dildo press against your pussy lips. With an air of defeat you lean back against it, but it withdraws and changes position. You now feel it pressed against your asshole.

"No, not there!" You squeak, weakly.

You try to reposition yourself but the machine is inhumanely fast and the tip of the massive dildo carefully slides into your back passage. You've never had anything up there before and the feeling is weird, but kind of pleasant. As the dildo moves deeper inside you bite down on your bottom lip, not sure if to prevent youself from moaning or crying.

The machine withdraws slightly then, after a brief pause, penetrates even deeper. It repeats this pattern until it can't seem to get any deeper. Once it has an idea of just how deep it can get it begins to fuck your ass for real.

"Stop. M- my ass..."

Each stroke is deep, filling you in ways you never knew you wanted. The brief, sharp pain slowly morphs into a satisfying sense of fullness. After a while you begin pushing back into each thrust. Deep inside you feel something building up.

"Don't..." You beg. "Don't- don't stop!"

You are moaning like a whore and fucking the dildo almost as hard as it's fucking you. Your insides suddenly tighten and your pussy swells.

"I'm gonna cum!" You cry, "Keep going, I'm cumming!"

The machine gives an extra hard thrust and your knees collapse. As you fall to the ground the dildo continues to pump away. With a mighty scream you cum, hard, but the fucking continues right into a second climax.

By the time the machine is finished you are a shivering wreck. You can't remember why you ever even resisted.