I (M35) when i was just a boy of 18 spent 10 months in a relationship that really opened my eyes to the world of kink. I was too young to be honest but heres what hapoened and the reasons i broke it all off.

As i said i was 18 at the time and she, we'll call her Maria, was 27. We'd fooled around a lot before we started our actual relationship, kissing in bars and clubs and id fucked her in my car, that kind of thing. We spent most the time together at the place she shared with her brother who worked away loads so we usually had the place to ourselves. I still lived with my mother then so this made sense.

Eventually we decided to start going out as a couple and i stopped seeing another girl id also been fooling around with. Things were relatively normal at first, basically vanila. But im getting ahead of myself, descriptions of us, i at the time was slim but well built, i was no athlete but lived on a farm so although i wasn't built like a body builder i was strong and didnt have an oz of fat on me. Maria was skinny to the point she was almost anorexic (something i definitely dont find attractive anymore) she was very flexible, had a plane face and small breasts.

Like i said things were vanilla, we fucked ALOT and she'd give me a blowjob at a mere suggestion but nothing weird or crazy. But things CHANGED FAST! we had a big fight (i don't remember why) and i left her place telling her it was over. The next night i went to a nughtclub with friends and her BFF (call her becky) came up and told me Maria was really sorry and that she would be waiting and her place in an hour to give me a gift if id be willing to forgive her.

-----This is where my world turned------

At first i wasnt going to bother but curiosity and horniness got the better of me. I turned up at her door having received a text (a precious thing back then, they werent unlimited) that told me to walk in the door was open.

I walked in and the kitchenette livingroom was empty, i walked up the stairs and entered her bedroom, she had a big double bed, a chair and a chest of drawers with the tv on it not much else would fit. There was a shelf with ornaments or something on it but i never paid it any attention.

There was Maria, face down, naked, blindfolded with something in her mouth and leather strap things cuffing her wrists to her ankles. There was a crudely drawn arrow pointing down her asscrack with lipstick and parcel tape over her pussy. On the chest of drawers was a pack of condoms, lube and a torn bit of paper with something like "i was wrong, sorry, anal ks my apology, make it hurt!" Or something similar.

I just stared at first. Not sure what i was seeing or what to think of it all. But i was 18 and staring at my girlfriends bared asshole with a litteral invitation. I had my clothes off and the condom on in seconds i threw some lube about and pounced. Now remember i was 18, all i knew about anal was a grainy porn tape id watched. There was no prep and no gentleness, i just forced it in and pounded. I had been drinking and i had stamina so i couldnt tell you how long it went on for.

Id never made Maria cum, she'd discussed with me that she'd never cum from sex and i assumed she was just being nice and i was doing something wrong. But at that moment balls deep hammering into her ass she cried out through the pants stuffed into her mouth and as i latched my mouth on her neck i remember her shuddering like fucking crazy and groaning like something inhuman.

Eventually i came and disposed of the condom and went about releasing her from her confines. We lay naked and talked alot that night and i demanded to know what the fuck that was. She explained when she was young she went through a trauma and now had a pain kink. Id never heard of this before but she explained she hated it about herself but she needed pain and degrading abuse to get off. I remember jokingly twisting her nipple then thinking it a joke and she yelped and then said yeah like that but far more pain. I was blown away and didnt know what was going to come from it.

Well for weeks i explored her. I used the internet to google it (think it might have actually been ask jeeves) and ended up down a rabbit hole of crazy porn and sites full of creeps. But i did get some ideas. I tested the water with degredation calling her things like "bitch and slut" when we fucked and damn that worked.

I fucked her anytime i wanted, anal wasnt a treat it was just a thing i took. When we watched telly my cock was in her mouth or her hand even if id cum and emptied every bit out if me id just have her playing with it.

But i soon realised that she wasnt slightly bothered by this, she enjoyed it but i came to thinking i was just tickling the surface of her kink.

So one night i knew her brother was in, and in his room, i told her to strip and lie on the bed face down towards the wall (the wall that faced her brothers room) i started just teasing her making her wet and then i lay a towel across her ass cheeks and took my belt. I whacked it across her cheeks knowing the towel would take the flesh wack noise away dulling it. She squeeled bighting her lip.

"You dont want your brother to know you're being a filthy slut do you?" I asked and she didnt reply just groaned. I whacked that towel with my belt like i was a carnival and she wriggled and tried to escape so many times, she was desperatly trying not to cry out bighting a pillow. I pulled the towel off revealing a red abd bruised ass, and had been lubing my cock with spit, i entered her asshole while she lay prone, shiething myself by pushing into the hilt. I hust lay there a while whispering into her ear, saying things like "do you think your brother heard me spanking you like you're a naughty bitch? Do you think he knows his little sister is in here with a cock up her ass?".

She just kept reply "shhh" and "stop it". I started to move slowly in and out her ass and i pressed against her red and bruised bum cheeks. While i continued "tell me you're a whore! Tell me this is my asshole to use when i want". She would whisper my words back to me, i started to thrust harder into her and something gave way, she just started to cry out and ask for it harder and harder i sat up and fucked her ass slapping her cheeks even redder than they were. Eventually i pulled out and came all over her back like only a young man can. I swear when i think back on it i felt like i was shooting cum forever.

I colapsed next to her and saw the content look on her face peel away as she realised how loud she'd become and what she had been crying out. "Fuck, he definitely heard that" she cried. I just laughed and dressed.

Let me know if its worth my time writing out what happened for the time after this and why i needed to end it?