I push my cock into Millie's ass

I move forward a little, then without Millie having time to react, I push my cock against her sphincter, rapidly pushing through, and my cock is entering her ass.

Millie feels my cock entering her ass, and her entire body tenses from the surprise and the pain, but I keep pushing my cock into her ass until I am all the way to the hilt in her ass.

Millie lets out a loud scream of pain, but I ignore it, and slide my dick halfway out, then push it back in again. Millie screams with pain, but I keep pushing in and out of her ass, with Millie screaming.

Then Millie screams:

"No!"

But I am too horny now, her ass feels amazing as she is not relaxed, so it is like her sphincter is trying to squeeze the cum out of my cock, so I keep pushing in and out of her ass.

Millie is still screaming, and each time my dick pushes into her ass, she screams "no!"

Millie is not relaxing at all, she is actually becoming tenser and tenser with each thrust into her ass, and she is screaming louder and louder, then she whispers:

"It really hurts Matt."

But I am very close to cuming now, so I push in and out of her ass a few more times, then I empty my cum into her ass.

As I am cuming, I relax my grip on Millie's hips, and that allows her to wiggle free of my grip, so she slips away from in front of me, my dick comes out of her ass, and she turns around and stares at me angrily, her eyes looking a bit watery. She just looks at me for a little while, then says angrily:

"What exactly made you think I wanted you to fuck me in the ass?"