They walked quietly back to the hotel. The cool evening air put Pete in a reflective mood. Mom’s surprise had been one helluva surprise.

The sex with Natasha had been good, and he didn’t feel at all guilty about paying for it. How many times had he paid for dinner and a hotel room for a one-night stand? This was just another one-night stand, in so many ways. Admittedly, it’d been one with his mother…

Which Natasha had actually liked. She could’ve faked it, but she at least looked like she got worked up by it.

And he had to admit that screwing Mom with an audience had been really fucking hot. It’d made it nasty and perverted and taboo… and downright amazing.

“What do you think her surprise is?” Mom asked.

“For ‘lots of Euros?’ Maybe another couple.”

“That’d be wild.”

“Yeah…”

“Are we going to do it?” Mom’s tone contained a hint of eagerness.

“How’d you feel about tonight?”

“I loved it!”

He chuckled. “Watching or being watched?”

“Both,” she admitted. “It was… um… not quite what I’d expected.”

“Oh?” Now he teemed with questions.

“I’ve… I’ve watched another couple before. This was… different.”

His mind teemed with questions, but he fought them back. He needed to let Mom talk.

“It was… more like a movie. This time.”

“She was doing it for you.”

“Yeah… I could actually see what was happening.”

He chuckled. “Maybe we should get a mirror.”

“Now that’s an idea…”

He laughed. “As long as it’s just a mirror.”

“What do you mean?”

“No photos. Those have a way of getting out.”

“Yeah.”

They walked quietly for another block before Mom spoke.

“I liked her watching,” she said. “Her knowing. That made it really hot.”

“Yeah. That it did.”

“Mmm.”

“So we’re going back?”

“I think so.”

***

Back at the hotel, they both took quick showers. Pete poured them some wine and they went out on the balcony in their robes. The cool night still held the sounds of intermittent traffic and the laughter or shouts of people out late. They sipped their wine in companionable silence. Pete let his mind drift.

He’d been fucking his Mom for a week now, more or less. He didn’t feel like doing an exact count of days. The sex had been amazing, for the most part. She was a sexy older woman who was a mink in bed. And the taboo…

The taboo bothered him. Well, not really. He didn’t mind breaking the taboo. He just didn’t like how much he enjoyed the taboo.

Natasha was the first woman he’d screwed since he and Mom had started. It’d been good, but… if Mom hadn’t been there?

It hadn’t been that good. Even if she was a pro. Well, it had been good, but not amazing. Not until Mom joined in. Then it had been incredible.

And, hell, sex with two women at once was always pretty damned good.

Mom stirred.

“Yeah?” he asked.

“Mmm… thinking about Natasha.”

“Watching her?”

“Well… no. Um…”

“Her sucking your tits?”

“Uh… yeah.” He could sense her blush despite the low light.

“Did you like it?”

“Mmm hmm.”

“Have you… um… been with…?”

“No… but…”

“You’ve been curious.”

“Yeah.” She started rocking slightly.

He chuckled.

“What?”

“We’re definitely going back.”

***

Pete woke in the middle of the night from a bad dream. Something about falling or quicksand. He shook himself and made himself get up and get some water. It helped calm him down. And as he did, he thought some more about the evening.

I was hard to believe how quickly and easily he’d accepted incest. The guilt about doing it had long since faded. He and Mom had had far too much sex for him to feel bad about it.

But… now?

They’d gone from just doing it to playing it up. To letting people know what they were doing.

To heighten the excitement.

Was that good? Or did they need to stop?

He didn’t want to stop. He really wanted to see what Natasha had been hinting at.

He thought about that until he fell back asleep.

***

The next evening was surprisingly cool, with a steady breeze after some late afternoon showers. Pete and Mom had eaten an early dinner at a nearby cafe and barely spoken. Certainly not about anything of importance. Now they strolled with forced casualness into the red light district.

Despite a vigorous round of morning sex, Pete could feel the adrenaline and testosterone coursing through him. Was it possible to be horny even after fucking multiple times a day for a week?

Pete’s eyes darted all around, but never settled on anything. The music from the nightclub/brothels didn’t entice him and tonight the neon just looked garish. Not that it got classier the closer they got to Natasha’s. He just didn’t care.

She wasn’t in her window, so they knocked on her door. Then waited. Then knocked again. Then waited just a bit more.

When the door opened, Natasha stood there with a huge grin on her face.

“You came!” She ushered them in. “You came! Bring much Euros?”

“We did.” Mom pulled a wad out of her purse that was thicker than the night before.

“Good, good! Come.”

They followed the redhead, and Pete noted that her outfit was much the same as the night before—a corset with garters and panties. This outfit was in all black, though, with ornamental gold buckles here and there.

She led them back to the bedroom they’d been in the night before. Natasha pulled the curtain and a short, wavy-haired brunette in white lingerie came in from the next room. She smiled at Pete.

“This Katja,” Natasha said. “Sister.”

“Your sister?” Mom asked.

“Yes, we’re sisters,” Katja said, with a strong British accent. She smiled. “Natasha says you’re mother and son.”

Pete looked carefully at Katja’s face. There was some resemblance to Natasha, but it was hard to be sure they were related.

“We are,” Mom said.

“And that you like incest,” Katja continued.

“Your English is very good,” Pete interrupted.

“I went to school in London.”

“I pay school.” Natasha smiled broadly. “She do well.”

Katja grinned. “She’s proud of me.”

“But…” Pete tried to figure out the right question to ask.

“You don’t believe we’re sisters,” Katja said.

“Oh, no,” Pete said. “I’m sure you are.”

“We’ll show you our IDs. Our real IDs. If… you’ll show us yours.”

Pete swallowed but Mom was already reaching into her purse.

***

They really were sisters. Their names weren’t Natasha and Katja, but Pete decided to call them what they’d told him. It was only polite.

Katja negotiated payment with Mom, but they spoke quietly enough that Pete didn’t hear. One they were done, Natasha motioned for Pete and Mom to take two chairs that now sat facing the bed. She once again disappeared into the other room while Katja pulled back the sheets. Then she once again climbed on the bed.

“So,” Katja asked, “how long have you two been together?”

“Well,” Mom said, “we’re not together—”

“Sexually.” Katja smiled. “How long together sexually?”

“About a week,” Pete said.

“Ah. So it is still new.” Katja smiled. “Good.” She nodded toward the door. “Natasha and I have been lovers for five years.”

“Lovers?” Pete asked.

“More like regular sex partners. Usually with customers, but sometimes…” She grinned and shrugged.

Natasha strode back in. “Begin, yes?”

Mom grinned and nodded.

***

The two women knelt on the bed facing each other. After making sure Pete and Mom could both see, Katja threaded her fingers through Natasha’s hair and pulled the larger girl in for a kiss. It was wet and passionate, and soon they had their arms around each other. Natasha moaned when Katja began kissing her jaw and behind her ear.

Pete shifted in his seat. He was quickly getting hard, and his cock strained against his pants.

Katja continued feathering kisses across her sister’s jaw and neck. Natasha slid one hand to Katie’s breast and caressed it through her top. Katja responded by working her way lower.

Mom whimpered. She had a hand down her pants and her eyes were glued to the women.

Pete smirked. Being dressed was silly. He stood and quickly shed his clothes. Mom noticed, and then did the same. The women on the bed only gave them a quick look before they kept going.

Naked, Pete stroked his cock leisurely. His blood was on fire as he watched and he didn’t want to come too quickly. Katja gently pushed Natasha onto her back and then pull her panties off. Katja took the break to wiggle out of her own. She was shaved, and her lower lips engorged.

Katja smirked. “Ready?”

Mom moaned.

Katja returned to the bed, nestled between her sister’s thighs, and began to lick.

Pete watched, spellbound. He couldn’t see the actual licking—just Katie’s head moving back and forth—but from Natasha’s shudders, she had to be hitting all the right spots. The redhead groaned and shuddered. She played with her own breasts and alternated between looking down at her sister and then at Mom and him.

“You like?” Natasha asked.

Pete and Mom both nodded.

“Join on bed. Better see.” Natasha patted the mattress next to her.

Katja looked over her shoulder. “Why don’t you go down on your mom while I lick my sister?”

Pete chuckled. “Fine by me.”

He and Mom moved into position. As he crouched between her thighs, he inhaled her scent. Mom was wet, and really aroused. Her clit poked out of its hood and her nipples were as hard as diamonds. He kissed her inner thighs and began to lick.

Mom shuddered as soon as his tongue found her clit. She smiled at him before her gaze turned to the other women. From her angle, Pete realized, she could see everything Katja was doing. He could only see Natasha’s chest rising and falling as she squirmed with pleasure. Well, that and Mom’s pleasure.

He decided he’d make Mom come first. He lowered his head and returned to licking and sucking. A few minutes later, he got his wish. She arched her back and shook as she moaned. A minute later, Natasha cried out as well.

Pete and Katja shared a grin.

“Now we switch,” Katja said. “If you get Natasha off faster than I get your mom off, you can screw my ass.”

Pete chuckled. “Now that’s incentive.”

“Um…” Mom said. She bit her lip nervously.

“Are you okay with this?” Katja asked. “I’m very good.”

“You have been curious,” Pete pointed out.

“Oh… yeah… sure.” Mom smiled at Katja.

Pete and the brunette switched places. Natasha’s pussy already was soaked and her clit peeking out. She gave him a saucy smile.

“Do good,” she said. “Katja like ass fucked.”

He chuckled and lowered his head.

Natasha was tangier and more fragrant than Mom. She also squirmed more when he sucked her clit. It was fun to watch her shudder, though. For a pro, she really was getting into it. But he’d barely gotten her gasping when Mom shrieked and came again.

Pete pulled back and watched as Katja continued to slowly kiss Mom’s inner thighs as she came down from her orgasm. It was so hot, his hard cock throbbed.

“Get rubber,” Natasha said. “Get rubber now.”

“Here.” Katja jumped off the bed, found a condom in a nightstand drawer, and tossed it to Pete. “Start with Natasha, but move to the middle of the bed.”

Natasha scooted sideways while Pete got the condom on. With a little direction, Mom stretched out on one side of the redhead while Katja did the same on the other.

“Get inside her,” Katja ordered, “and then support yourself on your arms.”

“Okay…” As wet as Natasha was, he had little difficulty easing his cock into her. Her pussy gripped him as he slowly adjusted his position and lifted up.

“Now,” Katja said to Mom, “we suck her breasts while he fucks her. Understand?”

Mom nodded.

“And then…” Katja got a devilish grin. “…after she comes, it’s your turn.”