Thanksgiving Eve

We drove up the gravel driveway to the farmhouse well after dark. I suppose I shouldn't have stopped to fuck my aunt without her realizing but... nah. You'd do it too if you had an aunt who thought you had to put your cock in her pussy because it was a bottle she wanted to open for its tasty sauce.

At any rate, we were just about the last to arrive that cold November night. The family farm is still a working farm with beef cattle, hogs and meadows for grazing and 80 acres of hay, but as I've said it's not really my parent's entire livelihood. It does let them "just" work part-time in jobs off the farm and with me and soon my sister off on our own, maybe they'll actually be able to retire and just live on the farm.

The farmhouse was originally built in 1870 but it's been added on to liberally over the years, especially as building codes still aren't much of a thing out in the country. When our family has needed another bedroom or a bigger kitchen, they just tacked it onto the back of the existing house, doing the carpentry and just about everything else themselves. Some of the older woodwork is some real artisan stuff, no Home Depot specials.

The house has eight bedrooms but it's not at all a mansion. Due to the convoluted construction, some of the bedrooms are located off of other bedrooms and the indoor plumbing was added decades into the house's existence so you can hear someone flush the toilet from my bedroom and other fun stuff. Still, it's home. Being back here made me feel happy on the deepest possible level.

The house was already full with relatives Wednesday night and we had a pre-Thanksgiving dinner, deliberately light so as not to spoil anybody's appetite for the big meal the next day. There was much "sitting around" in the living room by the stone fireplace going over the same G-rated family stories people always told, and Mom and other women played the piano for some sing-a-longs. It was all very ordinary family stuff, but cozy and heartwarming.

To my delight, we were already short of bedrooms so Aunt Olivia got my sister's bed and Christie got put in my room for the evening. Officially I was to sleep on an inflatable mattress on the floor. There were already about 20 relatives at the house, barely half of the total we expected as the rest would be arriving on Thanksgiving day (I told you, we have a big family!) I'd seen my sister from across the room all evening but we'd hardly interacted. She was wearing mom jeans and a baggy green sweater, very conservative clothing for the relatives, which didn't excite me at all.

But when we got alone in my bedroom after taking our (separate) showers, I had no shortage of excitement. Having some degree of sexual access to my sister (with her rules that I couldn't touch her pussy and she couldn't touch my cock) was very thrilling. As soon as the door was closed I pushed up her sweater and bra to expose her big tits, then leaned in to suck on her nipples without asking for permission.

"Hey, pervert!" she said, but sounded amused and not upset. If she didn't like any part of this it was just that I'd beat her to the punch. "Aunt Olivia not satisfying you?"

I tore myself away from my sister's meaty nipples. "We had sex on the way up," I said, "I told her my sauce bottle was being stubborn and it might open up if she used her pussy on it."

"Oh lordy," my sister said as I went back to sucking on her nipples, "You know she's just messing with you right?"

"Did she say something to you?" I said, in between feeding on her tits.

"No," my sister said, "But come on. She's a grown woman. Mom told me she has an IQ of 158. She can't not realize you're using her for sex."

I shrugged. "Obviously she has book smarts, but she's totally oblivious to real world stuff. You took advantage of that yourself, you bisexual perv."

My sister blushed then I leaned in to bite her nipple very gently. "Don't tell anyone I'm bi," she said. Our family's pretty conservative so even in 2022 she didn't want this info out there.

"Naturally," I said, guiding her to lift her arms so I could pull off her sweater and the T-shirt she had on underneath. "You can keep acting like the conservative farmgirl. Except when you're alone with me."

She grinned, actually seeming to like that. I undid her jeans and got her naked. She was shaved bare as ever... I wonder if she shaved knowing we'd be sharing a room and I'd surely have her naked. I liked that too.

"No fair," she said, "Take off your clothes too or you're a sexist."

I smirked at her ridiculous logic but hardly objected to getting naked around my sister. I peeled off my clothes and we naked on the bed, looking at each other. I suppose I didn't look that bad naked and gave my cock a few strokes to get fully hard. On a lark I'd shaved myself that morning so I'd match my hairless women.

"Very nice," she said, looking me over.

"Same," I said, looking over her big D-cups and wide hips, with pleasingly slim waist in between. "You're so sexy, sister." She just smiled at the perverted comment.

I knew we had to keep the volume down as the other relatives could be heard through the walls slowly getting ready for bed, and I was sure we could be heard if we did the stuff I wanted us to do at the natural volume for doing those things.

Once again it was thrilling to be naked with my sister on my bed, knowing she was as into this as me. I got on top of her on the bed and kissed her sexy lips, feeling her hard nipples pressing against my bare chest. My cock pressed between her thighs, then against her labia lips. It was so tempting to just ram it into her pussy, but that would be going way too far.

"Let me inside you, Christie," I whispered into her ear as I pressed my cock against her labia again, poking her pussy lips as if to crudely nudge her into agreement.

"M-Mark," she said, gasping, "I'm not on the pill! And our rules... that's the one thing we can't do..."

I sighed, but I knew she was right. Brother/sister **** was going too far, especially if she could get knocked up. Her mention of the rules gave me an idea though, it wouldn't be as great as fucking her, but finding creative ways to do perverted things without touching her pussy or having her touch my cock could be fun.

"Let me lick your asshole," I said with a grin, "That won't violate the rules."

Her eyes went wide, but I knew she was into this very thing. "Okay," she said with only the slightest hesitation. I knew it, my perverted sister couldn't resist the invitation to have her asshole licked.

My sexy curvy sister climbed around on the bed, trying her best not to make a racket. After all, if she got caught doing this it would be very bad for her too. Maybe even worse since she's the girl. She crawled around on the bed, getting on all fours, presenting her bubble butt to me with oddly bronzed skin. But then I remembered as a country girl she had access to more than one place to sunbathe nude. I spread her ass cheeks to reveal her shaved, clean asshole. It was soft and pink, never before seen by male eyes, it was her most intimate place.

"Lick me, Mark," she said softly. She was as into this as I was, if not moreso. I didn't find it the least bit gross to lick my sister there, she was perfectly clean as she'd just showered. I pressed my tongue to my sister's anus and she gasped in delight. Getting so lewd without violating "the rules" was incredibly hot for both of us, I think.

I tongued her butthole then gave it a big kiss.

"Ooh Mark, that feels so naughty... and good," she said softly.

"If I can't eat your pussy I'll eat your ass," I said boldly. She practically cooed. I went back to licking her ass and her fingers flew to her clit. That's wonderful, I thought, your brother eating your ass makes you want to masturbate.

I pressed my tongue against her anus and **** it insight. She gasped again and her fingers sped up on her clit. My tongue probed into her rectum, feeling nothing but clean warmth. I pressed my face closer and my tongue deeper, fucking her ass without breaking the rules. I was eating my 18-year-old sister's asshole and we both loved it.

She fought back a moan as I got my tognue as deep as I could. I rubbed her lower back and reached under to tweak her nipples. I bobbed my head back and forth to literally tongue fuck her ass. She rubbed her clit frantically then shoved her face into the pillow, using it to muffle her loud moans as she orgasmed.

We collpased on our bellies on the bed next to each other and tilted our heads to look into each others eyes quietly for a while, both of us giving a goofy grin.

Eventually she opened her mouth. I thought she was going to say goodnight, but instead she said, "My turn. I want to lick your ass, Mark."

I assumed you know, a guy can lick a lady's butt, we're perverts and ladies are cleaner. But I never thought my sister would want to return the favor. I certainly didn't expect it. But I'd just taken a shower too, and damn, the idea of my sister actually wanted to do such a perverted thing to me was hot as hell.

"Okay," I said, "it doesn't break the rules, after all."

We grinned at each other, both clearly loving our ridiculous game of following the letter of the anti-**** rules, while trampling on the spirit of them.

It was so much fun I forgot about Aunt Olivia for the moment. After all, she was my aunt who I fooled around with, would she even realize what I was doing with my sister, much less care? I spun around and got on all fours myself, presenting my ass to my sister. It made me feel surprisingly **** to be in the receiving position, but with Christie it felt okay.

Her soft fingers touched my ass cheeks and spread them open. She was giving me the once-over, naturally not wanting to do this if it was going to be gross.

"Clean as a whistle!" I said playfully.

"Moron," my sister, "You are clean though. You becoming a metrosexual on me, Mark?"

I laughed at that. "Yeah, I've got a man purse," I said, joking along with her since I was in a good mood.

My sister giggled, but then I felt a strange tickling sensation on my sensitive anus. It was Christie tongue curiously trying out licking her brother's ass. She gave it a big kiss, I could hear her lips smacking against my ass cheeks. I was rock hard and started stroking myself.

"Yeah, kiss me there, Christie," I said softly, not really feeling like trying to humiliate her for this, "Your lips feel so good. Give me a rimjob, sister. Since I just ate your ass."

She ran her tongue all down my crack, stopping at my asshole and licking around it in slow circles. I could hear her breathing heavily. I stroked my cock, making myself slow down so I didn't cum right away. I savored my incestuous rimjob, groaning in pleasure but keeping my voice down so we didn't get caught doing something so incredibly shameful.

Christie pressed her tongue gently into my asshole. She didn't go as deep as I had on her, but it was deep enough. I moaned in pleasure and stroked myself hard, getting close. I moaned again and she pulled back to shush me, then burried her tongue in my asshole again.

It was so hot and exciting in that room as my sister ate my ass and I stroked myself. The bed springs squeaked and I knew we had to wrap this up fast. I crawled around to face her, still on her knees from where she'd been licking me. I looked at her dangling tits and her eager face. She was such a horny pervert for what we were doing, just like me.

"Open your mouth," I commanded, "I won't touch you with my cock, I'll just cum in your mouth. It won't break the rules."

This was making an absolute mockery of the rules to supposedly avoid ****, but she opened her mouth without argument. I looked at her there, kneeling submissively on the bed, naked, her body glistening with sweat, her face red with lust. I stood now for the angle to hold my cock barely an inch from her lips as I stroked myself hard.

"I love you," I said.

She closed her eyes. "I love you too," she said, her mouth opening wider after she finished talking.

I groaned as loudly as I dared and shot my cum. It came out fast and hard, blasting the back of her mouth. She didn't flinch, letting me milk my cum into her, shooting rope after rope of sperm on her tongue.

Then she opened her eyes and looked at me intensely as I swallowed.

We had been so absorbed with each other neither of us had noticed someone had crept quietly into the room. But at the exact same moment, we felt the presence and turned in terror to see who had discovered our ****.