In her ass

"Well, truth be told," Suzy heard her mouth saying, "anything could fit in my pussy or mouth. The real test is if it will fit up my ass."

'No. I refuse," Suzy thought. 'I'm not letting this guy stick his cock up my ass. I absolutely refuse.'

"You don't get a choice, sweet cheeks," the Id said.

"Holy fuck, really?" Mark asked. This was way too good to be true.

"Yes, really," Suzy said, giggling. "I'm a total butt slut. Now, lock up the shop for now, get me your best lube, and let's get to fitting."

Suzy stood up as Mark got to work running around the shop. He locked up the shop and turned the sign to "Closed." He then heads over to an aisle and grabs some lube.

Suzy finds herself bending over the counter after having slipped off her skirt. She spreads her cheeks behind her and wiggles her ass a little as she waits.

'No no, I don't want this. I don't want a cock in my ass.' Suzy felt like she was going to cry.

"Oh, relax," the Id said. "If you just let him fuck your ass and relax those back muscles, you'll love it in no time. I'm sure of it."

"Okay, I got the lube," Mark said as he stepped up behind her. He opened the lube up.

Suzy felt herself relax, even though her mind was screaming. After a moment, he felt his wet, lubed finger up against her puckered asshole. Against her will, her ass relaxed even more. She felt Mark shove the tip of his finger lightly into her ass. Suzy shivered. It didn't feel bad, but it didn't feel good either. It felt weird.

"Alright, lady," Mark said as he lubed up his cock. "Get ready for your fitting."

Suzy giggled. "Shove it in, big boy. Let's see how well it fits."

Mark finished with the lube and positioned himself behind her. He wiggled the head of his cock against her asshole for a moment before slowly starting to shove it in.

Even the Id couldn't stop Suzy from wincing as the cock penetrated her ass. The pressure was immediately intense as the cock entered her tight hole slowly. She breathed in and out deeply as she tried to adjust to his girth. It wasn't long before Mark had shoved himself totally in her ass.

Suzy was gasping. "Alright. Alright. Stop for a minute. Let me adjust. You've got one big product there."

Mark smiled to himself and let her adjust. He was in heaven. It was like his cock was in the tightest, warmest hole he's ever felt. It couldn't have felt more snug.

After a little while, the pain subsided and Suzy nodded. "Okay. Please, be gentle for a little while." Suzy glanced back and smirked. "I'll give you the signal when you can start being rough."

Mark smiled and slowly began to thrust his cock.

As Mark fucked Suzy's ass, he felt like life couldn't get any better. Suzy kept breathing. Actually, after a few thrusts, it started to feel not-so-bad. Good, in fact.

That's when they both heard a sound at the door.