17/03/2026
At the end of pt 3 I told my brother in law that I would do anything that he wanted, wear whatever he want, anytime anywhere and all the time.
I had also told him that I wanted him to take my arse and make it his, to encourage the process I was wanking him back to hardness again after he had totally destroyed my pussy because I really needed him to fuck my arse right here right now.
I had done some preparation, sneaky purchase of a dildo, hindsight that it wasn't big enough, watched porn anal videos and got a tube of lubrication, think most of that was going to be used today.
Once again I said to my brother in law that I really wanted him to take me in the arse, after checking that I was serious and asked if I had done it before, to which I replied yes deadly serious and no this would be my first time, I think the look in my eyes convinced him that he really could take my arse, I felt inside, excitement, nervous, scared but above all extremely naughty borderline dirty for wanting this with another man.
He lent in and kissed me, I could still taste me on his lips after earlier, as he kissed he slowly slipped his hand down to my used pussy, and started to play with it again, all the while my hand was on his cock and it was definitely growing again, my fingers and thumb were no longer meeting as I continued to stroke his length, my thoughts were crap , have I really done the right thing here, this is going to hurt big time, no preparation was going to prepare my butt for this monster, too late now as I was brought back to reality as my brother in law eased 2 finger's in to my still drenched, still throbing pussy, he started to finger fuck me and relaxing me again I was feeling an orgasm building, yes that quick but I was still buzzing from earlier, more orgasms now today than I have ever had in my life.
He was using my pussy as lubrication for my arse, just as I started to cum again he slipped his fingers out and gently pushed one against my arse, this got my attention quickly, I was riding off an orgasm and was now riding the pain of a finger being gently pushed into my arse.
I yelped in pain, instantly he stopped, was going to withdraw but I told him not to.
I had to do this, I promised I would, I wanted to have him in my arse, I knew it was going to hurt so I knew that I would have to endure it, plus the more times we did this the easier it became ( that's what I kept saying to myself)
I relaxed and huskily told him to carry on.
He pushed again with his finger, I tensed up but no yelping this time, I was fighting the pain but also trying to relax, then slowly his finger went deeper inside me, the pain was now stinging but actually pleasurable, my brother in law was fingering my arse and I was loving it.
He paused a for a bit, I wondered why then felt why, a second finger was being pushed in, pain again but I fought against it but I yelped again, he went to stop but I shook my head and told him to carry on.
He did and the pain although intense quickly subsided as his second finger slipped in.
I was well and truly being finger fucked in my arse but I also knew that his cock would be a lot bigger and thicker but hopefully lubrication would assist.
After a few minutes I looked up at him and said Fuck Me i think we need to do this,
Whether I was being hasty I don't know but it was now or never, Brother in law asked if I wanted to be on my back or doggy style, I wasn't sure but said back because I wanted to look him in the eyes as he entered me.
He withdrew his fingers even that hurt, then picking up the lubrication he squeezed a good amount out and lathered it over his cock, the whole length as well before squeezing out another good amount and lathered it around my arse and inside as well surprisingly that didn't hurt so much this time,
I laid on my back legs wide, he put hands on my arse cheeks and got me to pull them apart.
Now remember I'm a size 8/10 petite 5ft 2 woman who had between her legs a fairly well built guy with a 8/9in thick as my lower arm cock who was about to arse fuck me
This was going to hurt but I needed to happen because I was becoming a dirty girl.
My thoughts snapped back to reality as my brother in law pushed the tip of his cock into my arse. Pain ripped through me despite the lubrication, I screamed out, he stopped instantly, fuck he wasn't even in and I was in pain. He checked to see if I wanted to stop, between short gasping breaths I said no. Just give me a minute, we laid there then I told him to carry on, he pushed again, jesus the pain but I didn't scream, probably no screaming was left, I tried to relax my arse but with a monster cock at its opening its kind of difficult to relax. He pushed a bit harder then suddenly my arsehole started to relax, bit by bit he was entering my arse, he kept stopping to check if I wanted to carry on, every time I said yes through pain gritting teeth, his top was inside me, slowly his thick shaft started to follow, the pain was subsiding and being replaced with unbelievable pleasure, I was literally gushing from my pussy and loving the feeling of a cock inside my arse.
I told him to slowly start to fuck me, but I say stop Stop . He said he would, slowly he started to thrust in and out, the pain was back but being overshadowed by the pleasure.
He went deeper inside me and I whimpered fuck me please, now obviously we had both cum earlier so he was on the second orgasm which should last longer but he said that he was wanting to cum because I obviously was so so tight around him, its looked into his eyes and told him to cum inside me, as deep as he could and dared.
He sped up a bit but also went deeper inside than before, I could feel an orgasm brewing. I screamed I was cumming and he literally sped up and went deeper exactly the same time as I came and he came inside me. I felt it shoot out and into my arse.
My anal virginity was well and truly taken.
We both held our position together unable to move for a bit, I felt his cock slowly start to get smaller and he gently pulled out, a little bit of pain but pleasurable as well. I can't explain how this next bit happened but as soon as he was completely out I was infront of him taking his cock straight into my mouth and cleaning him.
He looked at me in shock and said even my sister didn't do that, only dirty girls do that.
I was his dirty girl, being used on my husband's side of the bed.
Maybe another story soon about my new label as Dirty Girl
Poster:
Joanne