I posted the first chapters on Reddit a few weeks ago, you can also read [Part 1](https://erobites.com/straight/my-guilty-pleasure-part-1-the-accident/), [Part 2](https://erobites.com/straight/my-guilty-pleasure-part-2-cant-stop-thinking-about-his-dick/), and [Part 3](https://erobites.com/straight/my-guilty-pleasure-part-3-sharing-bible-verses/) here
**3 days after their encounter Marc and Lauren head back to school, the two hyper sexual teens can’t keep their hands of each other and decide to seek a quiet place to have some fun but they’ re not alone…**
**Tags: incest, straight incest, cis-man, cis-men, cis-women, hetero incest, brother sister incest, brother and sister, bro sis incest, outside sex, creampie, taboo sex, family sex, sex story, erotic story, free sex stories, erotic fiction**
It had been 3 days since Marc got a blowjob from his youngest sister, the beautiful and gracious Lauren. Ever since he couldn’t think about anything else, he wanted more, he wanted to see her pussy and fuck her but he knew he couldn’t. First of all it was wrong and secondly, Elizabeth almost caught them and he couldn’t have his big sister tell his parents that he and Lauren were fucking. But fuck, what was he supposed to do? His parents were strictly against their children having boyfriends or girlfriends and as a horny teenager he just had to release his seed, even if he did it in his own sister. The secret was a double edged sword, one on side it was super hot and he was glad he did it, on the other side it felt terribly wrong and he just couldn’t decide, it would switch constantly.
“Marc?” suddenly his teacher, Miss Swanson was standing in front of him waving in front of his face, having the entire class look at him with grins on their face. “Thinking about some sweet girl Marc Campbell?” Marc got red and shook his head. “Sorry Miss Swanson, I was thinking about eh…” he couldn’t really come up with an answer and the fact that his very own sister was in the same classroom as well, the one who gave him a blowjob wasn’t helping. For a fraction of a second Lauren looked at him and she turned her gaze somewhere else, god no one should ever find out they were having sex, she’d be dead.
“Spare me the details Campbell, just please pay attention in my class, it’s you who still has to get a degree, I already have mine” and she moved back to the board and continued her lesson about how the Industrial Revolution made Europe wealthy. Marc felt guiltier than ever, he had been like Eve in the garden of Eden, he pursuaded his sister to the path of sin by masturbating and allowing her to suck his cock, he should have been the better brother.
Soon enough the bell rang and this long hideuous schoolday was brought to an end. Marc walked towards his locker and stuffed some books in there. “Marc?” he heard his sister suddenly whisper and he almost immediately freaked out. “Sorry Lauren, but could you please never do that again” he said. She smiled and as always her lovely 18-year old smile enchanted her, how could anyone ever be mad at a sweet girl like her?. “Marc, I wanna talk, but lets not do that here, we could talk in the car” Marc nodded and he knew what was coming, what he had done to his sister was awful and wrong and she was gonna tell mom and dad.
With a heavy weighing heart he opened the door of his old pick up for her, once he was settled as well he looked at her. “So… what did you wanna talk about?” he said, barely being able to get it of his tongue. “Back in class, that girl you were thinking about was me, wasn’t it?” Lauren asked and Marc nodded in guilt “yeah, I’m sorry I should have never…” and before he could even finish his sentence her lips were on his and she did an attempt to passionately kiss him, she had never had a boyfriend to practice it on so he didn’t mind but he was surprised. He broke off the kiss immediately “are you out of your mind? We’re on the parking lot, if someone saw us like this, the whole county would know about us before dinner” he said. Lauren smiled again, but this time there was something dark about it, it was still a sweet smile but also a smile with lust, he could see the hunger in her eyes.
“Hmm you’re right, but after that night I’ve been masturbating nonstop, I couldn’t stop thinking about you and your cock inside me, I want it again” she said. He couldn’t believe what was happening, was this really going to be a thing? Him fucking his pretty, sweet girlish young sister on a regular basis? He felt his member pressing against his belt, he was hard and his cock was throbbing, begging to be freed and to fuck that young virgin pussy.
“Lauren, don’t say such sinful things…” he mumbled, hypocrite! He thought, for the past few days the only thing on his mind had been his sister and right now he was rock hard, he wanted her just as bad as she wanted him. “Oh c’mon Marc, you’re horny, I am horny, and mom and dad think we’re emotionless robots who have never heard of hormones, we both deserve to be happy don’t you think? And that throbbing cock in your pants is making me really happy” she said as she moved her hands to his lap and grabbed his cock through his pants.
Finally he gave in, his baby girl wanted his cock? She’d get it, and she’d get it hard, he bit her in her ear and whispered “fine baby, I’m gonna feed you my cock and fuck your pussy raw till it’s sore, how about that?” Lauren moaned when she felt his teeth on her earlobe “fuck yes, fuck me hard big bro, I’m your little slut” she whimpered. “Good, but not here” he said and he started the car, got of the parking lot and hit the road. “Think quick, what is a place between school and home where we can park the car and fuck privately?” he said. “The cemetery” she said out of the blue “people never really go there and the parking lot is surrounded by trees” Marc smirked, slipped one hand under his sisters skirt and moved his hand towards her slippery pussy. “My god, you’re so wet, you little slut, can’t wait for big brother to fuck you, now can you?” he said while concentrating on the road. “Fuck yes, fuck me bro, fuck me like the little slut I am” and the two drove off to the cemetery.
Once they arrived at the cemetery the two looked around, there was no living soul to be seen, quite litterally. As soon as the car stopped Lauren losened Marc’s belt and unzipped his pants, got out his rock hard throbbing member and put it in her mouth. “Hmm awh my god, thwis ish soow goood” she moaned she said while bobbing her head on his cock. “Fffffuck” Marc let out and he grabbed his sister by her hair, forcing her head onto his rod real hard a few times till she made some gagging sounds, she took his cock out of her mouth, spitted on it and continued working his cock while taking a breath before taking her own brother’s cock back in, tryingg to go as far and deep as she possibly could. Marc kept on hand on her head, following her rythm as his little sister went down on him, with the other hand he moved back to her skirt and he found his way to her pussy. He wasn’t entirely sure how to do it, but he wanted to make her feel good as well so he started playing with his young sister’s virgin pussy. “God Lauren you’re so fucking hot” he said, she was hotter than any other girl in class and the best part was that he got to fuck her and have her all for himself, how lucky could a guy be? It felt amazing to fuck her throat like this “lets get out of the car, I want to fuck you” he said and she took out his cock.
The two got out of the car and Marc immediately lifted up her skirt, pulled down her panties and carefully entered his virgin sister’s pussy for the very first time, it felt amazing, she was so wet and tight. “Ah, fuck marc, you’re so big, please be carefull though, this is my first time” she said with a smirk, turned around she kissed him. He grabbed her firm ass and slowly started building up the pace, this was so much better than masturbating. Her pussy was so slippery and tight, and feeling the weight of her soft smooth ass in his hands was amazing. He sped up his thrusts and started fucking her like he always had wished to do to one of his sisters, like all the girls in the porn videos he watched every night. With one hand he got into her shirt and he moved up till he found her budding breasts in her bra and started cupping one while fucking her brains out. Lauren could barely contained herself and moaned like the horny little slut she was. “Careful, we don’t want to wake the dead now do we baby girl?” he whispered in her ear as he continued penetrating his virgin sister’s pussy.
The sensation of a young tight girl wrapped around his cock was becoming too much, especially considering the fact that he was being incredibly taboo right now and he didn’t know how much longer he could hold it Suddenly his sister started shaking and her moans got higher pitched by the second, her pussy’s grip got even tigther and suddenly she came all over his cock which was too much for the 19-year old former virgin to handle and he came inside his little sister. “Fffffuck” he moaned as he painted her inner walls with his cum. The two religious teenagers were both out of breath, Lauren turned around and kissed him on the mouth “thank you so much Marc, that was exactly what I needed” she said and the two continued passionately kissing, which eventually got Marc back to full strength. “Wanna go for another round sis?” he asked with a devilish smile. “Sorry big bro, I love having your cock inside me but I think we have to go before Elizabeth gets suspicious and I might wanna change panties since your cum is dripping out of my pussy” those last words were so incredibly hot, he’d never imagine hearing them from his very own little sister.
Lauren pulled up her panties and straightened her clothes, they got in the car and the entire ride the two held hands while whispering lovey dovey things to each other. How could fucking your sister be wrong if it felt so good?
**Part 4 (you just read this)** [https://erobites.com/straight/my-guilty-pleasure-part-4-sinning-at-the-cemetery-gates/](https://erobites.com/straight/my-guilty-pleasure-part-4-sinning-at-the-cemetery-gates/)
**Part 5: Seen fucking by FTM brother…** [https://erobites.com/bipan/bipan-incest/my-guilty-pleasure-part-5-seen-by-our-sibling/](https://erobites.com/bipan/bipan-incest/my-guilty-pleasure-part-5-seen-by-our-sibling/)
Source: reddit.com/r/Erotica/comments/l319n0/ftm_brother_catches_brother_and_sister_fucking