Aunt Olivia comes home

Normally, a middle-aged woman, a quiet and conservatively-tempered librarian no less, would be horrified to walk into her fashionable condo and find two naked 18-year-old siblings on her couch. But not our Aunt Oblivia.

She walked in and said, "Oh it's so nice to come home to a niece and a nephew!"

She came over to kiss us hello, going for my cheek, but I turned quickly so she kissed me on the lips. She gave me a flat kiss, like she'd been prepared to kiss my cheek so she just kissed whatever was there and didn't notice that it was my lips.

She turned to Christie and leaned in to kiss her cheek too, and my sister pulled the same trick. Watching my naked sister kissing my oblivious aunt on the lips was a huge turn-on and I was hard already. Christie looked very excited herself and tried to prolong the kiss, but Aunt Olivia was just expecting a quick peck on the cheeks so she pulled back.

"How was the meeting?" I asked my aunt.

"Oh, very interesting," she said, "We went over policies for reducing Eurocentric, male-gendered and hetero-normative bias in the Universal Decimal Classification system. It was very interesting, and we got free pizza!"

Who knew that numbers could be sexist, racist and homophobic? As usual Aunt Olivia's work went over my head, but that was fine. If I ever worked in a university library it would just be to fix an electrical problem. Anyway my mind was on the subject of showing my sister just how much fun we could have with our aunt's obliviousness.

"Well go ahead and get in your house clothes," I said, pointing to my own nudity and then Christie's.

"Oh yeah, right!" Aunt Olivia said casually. She never quite knew what social norms were so she figured it was best to just do what other people were doing, which was an easy trait to manipulate. I'd discovered this was an even easier way to get her naked than stealing her clothes.

She undressed quickly and I was treated to the sight of her fit body and a second shaved hairless pussy. My sister looked her over too, no doubt comparing and contrasting, and seemed pleasantly surprised by how good Aunt Olivia looked. With her conservative clothing choices at family gatherings it was hard to know how attractive she really was.

We all exercised naked, taking turns on the elliptical machine and with the free weights. My erection was swinging about as I watched the two beautiful women work out, but I tried to focus more on Aunt Olivia than my sister. I guess it's **** either way, but looking at my sister made me feel especially guilty. Still, I got a few glimpses of Christie's shaved twat as she worked out. I'd have felt worse, except I noticed she was getting plenty of looks at my hard cock.

"Okay Aunt Olivia, time for squats," I said, giving my sister a wink.

"Christie, do those lady exercises," I said, forgetting the exact name. "Where you lay on your back and raise your legs."

"Lady exercises..." she said, laughing at me, "They're good for dudes too. They build your abs."

I shrugged. Christie still didn't get what I was going for, but that was fine. She lay down on the exercise mat and I stood naked over her for the fun of it, making her look at my cock and balls from underneath. As always, showing off my body to a willing woman was huge turn on. Not that I've got a Mr. Universe body, but I do work out regularly and compared to the other electricians, I'm not too shabby.

"Where should I do my squats, Mark?" my aunt asked. She made this too easy... but I hardly objected.

"Right here, in front of me," I said. Christie's eyes went wide but she didn't object. Neither did Aunt Olivia. Aunt Olivia stood in front of me, her feet planted on either side of her niece's head. Christie had stopped looking at my cock now, but I hardly minded since her focus was on Aunt Olivia's bald pussy.

I had two dumbbells so I was doing shoulder presses as a pretense to stand in a good position to watch the fun. "Okay, do ten squats," I said to my aunt, then added my perverted twist on the exerciser, "Remember to stay down each time for as long as you can. It will build muscle and endurance."

She smiled idly and squatted right over her niece's face. I half-expected my sister to object, if nothing else because she'd asked me to get Aunt Olivia to lick her, not the other way around. But she seemed to get the plan, that we'd introduce Olivia to the "exercise" this way then change positions. Or maybe she just wanted to eat her Aunt's pussy, my sister seems to be as much of a pervert as me, although she'd never admit it.

At any rate, about three seconds after Aunt Olivia squatted over Christie's face, I saw my sister extend her tongue and lick all along her aunt's labia lips. Yeah, my sister was definitely bi, she was eating pussy! It was so sexy to learn my sister was a rug muncher in such a visual way. Not that Aunt Olivia had a rug, thankfully.

I could hear my sister's tongue lapping at Aunt Olivia's pussy. I wondered if this was the first time Christie had gone down on a woman. She sounded like she was really going for it, slurping her own aunt's honey hole. After quite a long squat and much oral pleasuring, Aunt Olivia stood up as I felt Christie do her leg lefts and tap me in the back with her toes, as if to say "Look at what I'm doing!"

"What exercise are you doing, Christie?" Olivia asked pleasantly.

"Ummm," my sister said, "Lateral tongue extensions and jaw flexes."

I almost burst out laughing my ass off at my sister's ridiculous explanation, but knew that was the one thing that might ruin this.

"No, I mean with your legs," Aunt Olivia said sweetly. My sister blushed badly and gave a brief explanation of her leg lifts.

"They're harder than they look," my sister added.

"So are these squats," Aunt Olivia said, "Mark sure suggests hard exercises for us. But no pain no gain, right? Your tongue exercises help me too though, do them again!"

With that, she squatted down once more on my sister's face, this time pressing her bald cunt against Christie's lips. I couldn't see so well but the slurping sound I heard left no doubt that my sister was eating my aunt's pussy eagerly. It sounded like she was trying to push her tongue as deep into our aunt as she could get it. Olivia moaned in pleasure from her niece's tongue. "Oh that does make this easier, please continue!"

My sister was nominally doing her leg lefts, but they came so slowly, it was clear she was focused on eating pussy, it sounded like she was licking Aunt Olivia's clit now, and the look on our aunt's face was pure bliss, seemingly confirming that. It was so hot to learn that both women enjoyed incestuous lesbian sex, even if Aunt Olivia amazingly had believed that this was just an exercise. My sister sure knew what she was doing.

Aunt Olivia's body glistened lightly with sweat as she kept squatting on Christie's face. I was lifting the dumbbells without paying much attention as I watched the action. I was only looking at my aunt's tits, my sister's tits, and my sister's head under my aunt's pussy. I felt something against my cockhead and jerked my eyes there to see I was pressing up against Aunt Olivia's mouth!

She was very distracted by the pleasure my sister was giving her, and her mouth was slightly open. I knew I had to do it. I pushed my cock inside my aunt's mouth, taking advantage of her focus being elsewhere. Her mouth unknowingly accommodated, letting me set my shaft on her tongue. She had her eyes closed, from the pleasure mixed with the pain perhaps, from holding the squat for so long.

Having your cock in a woman's mouth without her even realizing is so hot. Her mouth felt so tight, and she wasn't sucking my cock, but that made it feel even better somehow. Like I could just use her mouth to pleasure myself. I rooted my cock around, pressing against her cheeks, enjoying the free reign I had with her so distracted by her own pleasure as my sister licked her pussy.

Aunt Olivia stood up, my cock sliding out of her mouth and hitting her chin, then her tits as she rose. I thought the jig might be up but she squatted back down as quickly as she'd gotten up. Oh yeah, she thought she was doing a legitimate exercise. I suppose she was exercising, she was just also having an unknowing threesome.

Christie went back to work eating her aunt's pussy and I resumed using her mouth, casually forcing my cock back in. She tightened her lips, probably a reflexive response as I started to push deeper then pull back, gently using her for my pleasure. It was almost a blowjob, but she didn't use her tongue, or move her head. I think I liked it better that way, doing all the work to get off using her mouth as a fuckhole. I pushed in deeper, making her take half my length, then even more, unable to resist forcing some approximation of a blowjob. She didn't object.

I heard my sister's tongue slurping away and Olivia moaning from her incestuous cunt-eating as I used her mouth. I pushed in too deep and made a gutteral, gagging sound "Gluck!" It was sexy, but I didn't want to actually hurt her so I pulled out. I was sure Christie knew I was violating our aunt's mouth, but I didn't care. I rubbed my shaft against her tongue, making her lips tighten, then I started to cum. I'd made her give me an orgasm and it was glorious. I shot my sperm in her mouth and she swallowed it down eagerly, no doubt subconsciously recognizing her favorite "sauce" and eating it hungrily.

She moaned loudly onto my cock as I rested it on her mouth, and I knew she was cumming too. My sister did a leg lift and poked my back, as if in pride from making our aunt cum. Olivia's body shook as she road an orgasm on my sister's tongue, then she did a few last squats, my sister licking each time.

"Am I done with my squats now?" she asked sweetly, licking her lips.

"Yeah, I suppose you've come to the end of that exercise," I said slyly, doing a token lift of my dumbbells, "Now change positions, ladies. You each need to do all of these exercises."