Sister takes a shower and I fuck her boyfriend! AO

Title: “Sister’s Shower Surprise”

I could hear the shower running in the bathroom as I crept down the hallway, my heart pounding with anticipation. My sister Lena had been dating her boyfriend Mike for months now, and I couldn’t help but fantasize about the gorgeous blonde teen whenever I got the chance. She was everything a guy could want – perky tits, a tight ass, and long platinum hair that looked perfect even when it was wet. And today, fate had dealt me a perfect hand.

I glanced around to make sure no one else was home, then slowly turned the bathroom doorknob and slipped inside. Steam filled the air, obscuring my view of the shower. But I could see the outline of a curvy young body through the frosted glass.

“Hey Liv, is that you?” Lena called out, her voice muffled. “Don’t forget to take out the trash when you’re done!”

I grinned, knowing she couldn’t see me yet. “No problem, sis. But first, I was wondering if I could…join you?”

There was a pause, then a shocked squeak. “What? No way, get out!”

Ignoring her protests, I stripped off my clothes, revealing my toned physique. Climbing into the shower, I pulled open the glass door. Lena stood under the spray, suds sliding down her naked body, mouth agape.

“Liv, what the hell?” she sputtered, trying to cover herself. But I could already feel my cock starting to throb at the sight of her glistening tits and trimmed pussy.

I stepped closer, my bulge obvious. “Come on, I just wanted to…” I reached out to stroke one of her taut nipples. “Have some fun.”

Lena’s cheeks flushed and she bit her lip as I teased her. “We shouldn’t… Mike would be so mad…”

“Mike’s not here,” I pointed out, grabbing her ass and pulling her hips against mine. “Just you and me, baby sis. Think how good it would feel…”

Groaning, Lena finally caved, letting me fondle her breasts. Her body was so soft and warm against me, and I couldn’t help grinding my hard cock against her. “Fuck, you feel amazing,” I growled.

“I can’t believe we’re doing this,” she whispered breathlessly, looking up at me with lust-filled eyes. “But it’s so wrong…” Her resolve was clearly crumbling.

I smirked and spun her around, bending her over and pressing her hands against the shower wall. “Don’t worry, I’ll make it worth your while.”

Lena gasped as I notched my thick tip between her wet folds. She was already hot and ready for me. I teased her for a moment, rubbing the head of my cock over her clit. Then with one smooth thrust, I buried myself deep inside her tight little pussy.

“Oh God!” she cried out, stretching around my impressive girth. I had to take a second to savor the incredible feeling of her slick, velvety walls squeezing me. She was the tightest, most perfect fit I’d ever experienced.

Gripping her hips, I started to fuck her hard and fast, not holding back. The lewd slaps of our bodies colliding echoed through the bathroom along with Lena’s desperate moans. She tried to be quiet at first, but soon she was crying out shamelessly each time I pounded into her.

“That’s it, take my cock,” I grunted, pistoning my hips. My sister’s teenaged pussy was heaven, clamping down on me like a hot, wet vice. Water sluiced over both of our writhing bodies as I railed her from behind.

“Fuck, Liv… I’m gonna… gonna cum,” Lena panted, shoving her ass back to meet my thrusts. I could feel her whole body trembling and clenching around me, right on the cusp of orgasm.

Reaching around, I frantically rubbed her clit, making her let out a sharp scream. “Yes, cum for me Lena! I’m so close…”

With a guttural moan, Lena’s pussy spasmed intensely, milking my cock as she came undone. The sensation was too much, and I thrust deep one last time before exploding inside of her, pumping wave after wave of thick, hot cum.

“Liv… oh fuck yes…” Lena whimpered deliriously, collapsing forward and supporting herself on the wall. I could feel my seed leaking out around my still-hard cock, dribbling down her thighs.

We stayed like that for a long moment, panting and catching our breath. Finally, I pulled out and grabbed the soap, beginning to slowly wash my sister’s trembling, well-fucked body.

“Mmm, that was incredible,” I murmured in her ear, nibbling on the lobe. Lena shivered, a satisfied smirk playing on her lips. She looked thoroughly debauched, her face glowing and hair plastered to her brow.

“I can’t believe I let you do that,” she admitted, turning to face me. “It was so dirty and forbidden. And hot as fuck.”

I grinned, grabbing her ass and pulling her back in close. My cock was already stirring again, eager for another round. “I’m glad you enjoyed it, sis. Because I sure as hell did. And I know we’re far from done…”

Lena moaned softly, her hand reaching down to stroke my rehardening length. “You’re insatiable,” she accused playfully. “I’m going to be sore for days after everything you just did to me…”

“Good,” I growled, looking forward to seeing the evidence of our tryst. “Maybe next time, I’ll fuck your ass too. Stretch out that tight little hole.”

Lena’s eyes went wide and she bit her lip, the thought obviously exciting her despite her shock. “Fuck… You’d better not tell Mike,” she said, knowing full well that I had her now. She’d ended her dry spell with her boyfriend’s brother – there was no going back from that…

As she turned off the water, I pushed her back against the shower wall, ready to continue our forbidden fuck fest. The day was still young and just getting started. I couldn’t wait to see what other naughty acts I could coax my adorable blonde sister into…