About 3 weeks ago, my brothers exgf gave a toy. I thought nothing about it as we had shared toys we bought in the past. Turns out the toy is actually a mold of my brother's dick. I didn't even know that could be done. Yes, I have used it a few times, quite a few to be honest. It has sparked some fantasies now that I do know. And, I admit, my orgasms have been better while using it and knowing it is of him. I can't say I am willing to just go and fuck my brother. I do look at his bulge more than I ever have and am guilty of being more Flirtatious with him than I ever was before. Yes, a part of me is curious to know what the real thing feels like but, I don't know if I could actually go through with it. Is this a form of how incest can start? Will my continued use of it help lead to something more? If it were to happen, is the guilt of doing incest really something I should pay attention to? Any feedback would be appreciated. Also, those who have actually done it, is it as good as sex with just another guy?

Thought I'd share this with ML since I've lurked here long enough.

There's lots of video's and stories about brother/sister stuff but I'd like to post up my own story, as it doesn't quite fit the 'stereotype' you read most of the time.

I work for a company making sex toys for men and women, my family all know but it's not something we talk about a lot as you can imagine, while us younger siblings are generally happy to talk about it, the old folks get quite embarrassed and don't really 'get it'.

I'm the youngest of 4, 2 brothers and 2 sisters, my next oldest is my sister, let's call her lily, she's who this concerns. So I'm a software dev, I work on embedded control systems, so basically the computer which controls the motors, lights and more recently the Wifi/Bluetooth stuff. Yep, the IOT is here and it's in your vibrator.

I have several of the development models at home as well as the programming gear, so I can make and test new macro's and subs in a real world environment. Obviously I have both male and female models, and of course I use the male ones myself, yes they are incredible and although not the real thing they do 'hold your attention' as it were (the downside being that the dev models have logging and anyone with the admin details can log in and see activity, so you have to be pretty careful to delete NV Data).

A few years ago at Christmas I had the family over to my place and had my brother and lily staying in the spare rooms, the old's had got a taxi home and my brother had gone out with some schoolfriends for the night leaving me and Lily in the house for a quiet night in with some wine amongst the madness of the festive period. The conversation predictably turned to work, which isn't unusual as we've not really talked about my job in any great detail. Lily's a smart girl, a expert engineer herself and working in the city means she doesn't get to see the family much. She's also beautiful and I'd be lying if I said I hadn't thought about her sexually before but I keep that stuff to myself and haven't ever acted on my feelings etc.

So She's asking about what I do and we've had a few drinks so I explain how I'm the main software dev, I make the maps that decide how fast or intense the vibrations are, I get given a specification and write the software then test it on the hardware and submit it to the rest of the development team. Predictably she asked if I can write my own 'maps' and how I would know if they're any good. Being a bit hammered I explain quite confidently that maps which are good for guys are generally good for girls and I test them myself, but obviously the motors are in different positions so the effects are slightly different, the clit stim on a 'sybian' style device becomes the frenulum stim under the head on a sleeve. The shaft motor stays in a similar position. Also female models operate at a higher frequency.

She asks to see the development models so I laugh and say ok, lets go to my 'red room' (the study where the computer and models are) she knows exactly what I mean. I'm really turned on at the thought of showing her the models and am getting quite nervous, she's going to see the toy which I've fucked and cum inside of probably hundreds of times.

In fact, the whole experience is very matter of fact, she's not embarrassed in the slightest and catches me completely off guard when she asks if I can get company discount! She really likes our sybian style model and wants to try one. I offered her to try the development model as it's never been 'used' before.

She jumped at the chance and I unplugged it all, set it up in her room and made sure it was working. The basic control knob panel is in my desk at work, but the dev keyboard is easy to use, press 2 numbers and enter then and you're running one map. I show her and wish her luck, laughing as I close the door behind myself. Maybe 20 minutes pass and I can hear the unit running, no screams or moans (obviously I'm listening) but it's going so she must be having a nice time, the humming soon stops so I assume that she's done and continue on with what I'm doing but then I get a shout from upstairs.

I go up and knock on the door, she calls me in and I find her on the bed in a dressing gown, toy switched off etc everything normal. However she tells me that it stopped responding to the buttons, and after a while it just stopped. I laugh and tell her that yea, the software does that sometimes so I switch off at the mains and back on again, run one of the programs and tell her it should be ready again and leave. Again I hear the gentle and then not-so gentle hum as she moves on to another mode. A few minutes pass and it goes quiet again, then I get another shout from upstairs. At this point I'm more embarrased at the failure of the machine the the fact it's supposed to be making my sister cum.

I knock and enter again, however this time it's not the same, she's on the bed but also still on the toy. I was stunned and tried to hide my shock, but it was obviously not easy to hide. She's wearing a negligee just covering her tits and pulled over the front so I can't see her sitting on the business end. It's stopped responding and stopped running again so I reset it again and grab the keypad. I punch in a test code and the motor starts very gently and starts to ramp up, she groans slightly and put her hands on the front of the machine to steady herself. I ask if she's ok and she says yea, don't stop it.

I'm controlling the toy which is vibrating my sisters clit right in front of me, I'm absolutely horny as fuck and it's beginning to show, my cock is visibly pushing against my jogging pants. She notices and gives a funny smile, but she's being completely distracted by the increasing vibration on her clit, I think she's not far from cumming after a few minutes but she's staring at my cock and keeps looking at me, staring right into my soul. She then says something I don't expect, 'let me see your cock'.

I have to put down the controller and slide my hand into my pants, giving myself a rub before pulling them down a bit so it popped out. She audibly groaned at the sight of it and seemed to be getting closer, I was giving myself a good rub. Right then she reaches out and grabs for me, taking my cock and expertly rubbing it with her really soft hands. I couldn't believe it was happening, it still surprises me now to be honest.

She rubbed me for a while and I could tell she was getting close to cumming as she kept stopping and just holding my cock, i didn't mind as I could tell she was having a really good time. Slowly but surely she pulled me closer and closer, bent over at probably a quite uncomfortable angle she did what I was hoping for and took my cock in her mouth. I was in absolute ecstasy and she could tell, she was really going for it. It wasn't long before she buckled over as a powerful orgasm hit her though. I took over rubbing my cock but she came right back and started playing again, before taking me in her mouth and giving me probably the best blowjob I've ever had.

Of course it wasn't long before I came, all of this was too much and i shot so much cum it felt like it would never stop. She made an admirable effort to swallow but I pulled back and it went everywhere, all over her mouth, tits and all down her front.

That was pretty much the end of that night but there have been other since, if anyone wants to hear them that is.