Fuck! I can’t believe what I’m seeing in my parents’ living room. Three giggling teenage girls, wearing sheer lingerie are sitting on the couch cheering on a fourth girl who is attempting to deep throat a dildo. What the fuck! The cheers and laughter is probably why they didn’t hear me come in through the kitchen door. I step back into the shadows of the hallway while my cock responds to the luscious, pale ass cheeks of the fourth girl. Her purple sheer nightie has ridden up over her heart-shaped ass, revealing her matching thong as she starts to gag on the rubber dick suction-cupped to the glass topped coffee table.

“I can do this!” the girl exclaims, taking a deep breath and sliding her lips back down the realistic looking cock. Holy shit! That’s Lauren’s voice! My dick is hard and I’m having perverted thoughts about my 18-year-old sister. I guiltily look away from her scrumptious ass cheeks and try to forget what her lips look like sliding down that fake cock.

“I thought you said you had done this before,” laughs one of the girls, pulling my attention back to the couch. The other three girls are wearing similar outfits, sheer baby doll nighties with matching thong panties. The only variation seems to be the color.

“I have done it before,” my sister protests, “but with a real dick! This thing isn’t working for me. I need a real dick.” Lauren sits back on her heels and laughs along with her friends.

“There appears to be one in the hallway!” The cute black girl sitting closest to me says as she smiles in my direction. Fuck! Busted! I might as well take the offensive and try to put Lauren on the defense.

“Brandon!” Lauren screams, jumping to her feet as I step into the room. Her tits bounce temptingly inside the cups of the purple nightie. “What the fuck are you doing here?”

“Never mind about me? What the fuck is all of this?” I sweep my arm towards the coffee table where, besides the suction cupped dildo there are several vibrators and other assorted sex toys. “What’s going on here?”

I’m six years older than Lauren and I’ve been living with my girlfriend for the past couple of years. I crash at my parents’ house whenever Kelly and I fight, which seems to be happening quite often lately.

“We’re having a sleepover,” Lauren says as if that explains all of this. While she’s getting outraged with me, I’m checking out her girlfriends. It’s like looking at a live action Victoria Secret’s ad. There’s the African-American girl who spotted me in the hallway. My eyes zero in on the yellow nightie barely covering her impressive chest. Next to her is Kristina, Lauren’s petite blonde friend from down the street, looking pretty in her pink lingerie. Finally, on the other end of the couch is a tall brunette all decked out in the sexiest shade of red.

“A sleepover?” I ask, raising my eyebrows as I appraise their outfits. The tops are sheer except for the bra-like cups around their breasts. In actuality, except for the thong, they don’t show much more than a skimpy bikini but somehow it is much more enticing when it’s lingerie.

“We had a lingerie party,” the black girl explains, smiling without a hint of embarrassment. “Do you like our outfits?” She stands and twirls around giving me a great view of her full, round ass cheeks.

“Alex!” Lauren admonishes her. “That’s my brother!”

“Well, you should at least introduce us,” Alex answers, stepping forward with her hand extended. “I’m Alexis but you can call me Alex.” She smiles as I shake her hand.

“Brandon,” my sister takes over the introductions. “You know Kristina,” she says, pointing to her friend in the pink nightie. I nod in her direction.

“Hello, Brandon,” Kristina smiles demurely.

“And this is Kylie.” The tall brunette stands up and extends her hand.

“Nice to meet you, Brandon,” she says, making eye contact. Damn! We’re almost the same height and I’m a little over six feet.

“My pleasure,” I answer, shaking her hand, which is surprisingly small and feminine given her stature.

While being introduced to her friends, I steal surreptitious glances at my sister. She has really filled out over the past couple of years. Something I hadn’t noticed during my previous visits. Of course, she wasn’t wearing sexy lingerie any of those times. Fuck! My cock is hardening again. This is so wrong.

“What are you doing here?” Lauren asks, drawing my attention back.

“I needed a place to stay,” I shrug without further explanation. I’m about to ask her whether mom knows what she’s up to but my sister and I have an unspoken agreement about not embarrassing each other in front of our friends.

“Well,” I smile at the sexy foursome. “Sorry to have interrupted. I’ll just head up to my room and leave you girls to your fun. Where are mom and dad?” I ask.

“They’re at the cabin,” Lauren answers, referring to our lake cabin in the mountains.

“With my parents,” Kristina adds. Kristina has been Lauren’s friend since they were little and our parents frequently go to the cabin together.

“The house is all ours for the weekend,” Kylie smiles.

“Why don’t you stay? The fun’s just starting,” Alex says with an unmistakable flirtatious invitation. I hear my sister’s exasperated sigh before I can even respond.

“That’s okay,” I answer, moving towards the hallway. “It was nice meeting you,” I call back over my shoulder.

“Damn! He’s sexy. You should have asked him to stay, Lauren,” Alex says as I turn the corner towards the stairs. I wait just out of sight to hear her response.

“He’s my brother!” she retorts. “I don’t want him anywhere near our sex toy party, or any of our other plans.” Whatever that means.

“He can be my sex toy anytime,” Kylie says. “How old is he?”

“Too old for you!” my sister snaps. She’s right and that’s my cue to keep moving.

Half an hour later, lying on my bed and trying to get the sexy images of my sister and her friends out of my head, there’s a light knock on the door.

“Come in,” I call without moving from the bed. Lauren pokes her head in before opening the door the rest of the way.

“Hey,” she says, walking over to the bed. “Sorry about all that.”

“Nothing to be sorry for, Sis. You didn’t know I was going to be home tonight, and I certainly didn’t know you were having a lingerie party.” I answer as she sits on the edge of my bed. She’s still wearing the same outfit and I can’t keep my eyes from darting between the swell of her breasts and her barely covered pussy mound. “Sorry, if I messed up your party.”

“That’s just it,” she smiles. “You were a very popular surprise.” I just smile and wait to see why she came in to see me. “Brandon, do you love me?” she asks, using our standard opening for asking a favor.

“Unconditionally,” I answer, realizing as I say it that it really is true. I thought I loved Kelly but there are always so many conditions in that relationship. Fuck! Don’t even ask me why I’m comparing my sister to my girlfriend. That’s just so inappropriate!

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