I flew into Prague for work and figured I'd blow off steam the easy way. Booked an escort through some shady site that promised no questions, just raw fucking. The ad said "young, tight, willing to do anything for the right price." I picked the one with the black hair and the ass that looked like it was made for pounding. When she walked into the hotel room, my cock went rock hard before I even saw her face.
It was my sister, Lena.
She froze in the doorway, wearing a short black dress that barely covered her cunt. "Mark? What the fuck?"
I should have told her to leave. Instead I shut the door and said, "You showed up. You take the money, you fuck."
Her eyes dropped to the bulge in my pants. She licked her lips without thinking. "You're really gonna make me do this?"
"Take the dress off."
She did it slow, like she was still deciding. The fabric slid down her tits, then her flat stomach, then over her shaved pussy. She stood there naked except for heels, nipples already stiff. I pulled my cock out and stroked it.
"On your knees."
Lena dropped. Her mouth opened and she took me deep, no warm-up. Spit ran down my shaft while she gagged herself on it. I grabbed her hair and fucked her throat hard, balls slapping her chin. She moaned around my dick like a cheap whore, and I realized she liked it.
I pulled out and bent her over the bed. Her ass was perfect, round and spread. I spit on her asshole and shoved two fingers in while I lined my cock up with her cunt. She was soaked. One thrust and I was buried balls-deep in my own sister's pussy.
"Fuck, Mark, you're huge," she gasped.
I didn't answer. I just started pounding. The room filled with the wet sound of my cock slamming into her. Her tits swung and her ass rippled every time I bottomed out. I reached under and rubbed her clit until she came, cunt squeezing me like a fist.
I flipped her onto her back, threw her legs over my shoulders, and kept fucking. Her pussy made filthy squelching noises. I spat on her tits and slapped them while I drilled her.
"You like your brother's cock?" I growled.
"Yes, fuck, don't stop."
I pulled out and made her taste herself on me again. She sucked like she was starving. Then I pushed her onto all fours and took her ass. It was tight as hell. She screamed into the pillow while I worked my cock in inch by inch, then started fucking her ass like I owned it. Her fingers rubbed her clit the whole time.
We went at it for hours. I came in her mouth first, watched her swallow every drop. Then I fucked her cunt again until I filled it. She rode me reverse cowgirl after that, ass bouncing, telling me how much she loved getting paid to fuck her brother. I made her squirt on my cock twice.
By the time we were done, the sheets were soaked and she was leaking my cum from both holes. She counted the money I left on the nightstand, dressed without a word, and left.

But we both knew this wasn't the last time I'd book "the escort" in Europe.