So, I am not quite sure if I or my story fit here, but I never really had the opportunity to tell the full story and I kinda want to. Please disregard me or tell me if I did something wrong.

My name is Sophia, I am a 26 year old transgender girl from Germany. I have been on hormone replacement therapy for over 8 years now and I am quite happy with how I turned out. I pass as a girl in everyday life and people that are close to me accept and acknowledge me.

When I was around 18 I met the love of my life. Her then being 16. (please don't be scared off, in Germany this is completely in the realm of consent.) I did not think she could fall for someone like me, but she did. To my even much bigger surprise she was fully open about me being transgender and was both a pushing and supporting force. Always insecure I thought she would leave me for someone better, but ... she never did. Our relationship was going strong and great, the only thing that was always kinda lackluster and unsatisfying (For her) was our sexlife. While she is the dominant partner in our relationship she really does enjoy being submissive in bed. Problem is that I am certainly not dominant. My penis was always small to even very and with hormone treatment maintaining erections has become harder. On top of that I always pressured myself in my head that I need to perform and that also put me off. If I were to guess I don't think I ever gotten her to achieve an orgasm via penetration. What I did do a lot though is perform cunnilingus to her full enjoyment. She never ever said or mentioned anything about me not being good enough in bed, but of course I could feel her sexual frustration and it got me worried.

About three years into the relationship I first came into contact with cuckolding and cuckolding porn. I was shocked at first and even more shocked at the fact that I enjoyed it. Of course this got me thinking about the idea of seeing my girlfriend with "another" man and while my heart got filled with jealousy at first I cannot deny that I instantly got hard. Faster and harder than I would when seeing my beautiful girlfriend naked. At first I tried to shake off the thoughts and feelings, but the curiosity was always lingering. At first I wanted to carefully find out what she was even thinking about it.

I bought a big transparent dildo online and during our next sexy time I told her I wanted to try something new. She was surprised but not against it. I told her to lay down and I laid next to her. Slowly inserting the thing into her as I gently kissed her ears, her neck and her nipples. I told her to close her eyes as I tried to fish for certain things with careful language. "Fudge, this big cock looks really good inside you". My heart was racing. I did not know how she would react to that, but it was positive. "And it feels really good inside me aswell" she moans with her eyes closed. I got instantly hard as I felt my heart exploding. I gently tip toed around the subject as I was continuining to insert it into her. I did not wanna push it too far at first, but I think I got a good idea that she was actually craving for bigger cock. I made her touch my little hard on as we intensely kissed. I grinned as I asked her "can't compare, right?" as she softly moaned "nuh uh". At this point I could have orgasmed so hard already, so I slowed myself down. In the end, she orgasmed from me pushing the thing inside her and gently teasing her body. This was pretty much the start of the end of us having "classic" penetrative sex.

Over the next months this ordeal happened more times and I could get her a bit further. At this point I got a really good idea that she needed it. And I wanted it too. I did not quite know how to proceed. I saw other things online and I suggested to her a fun idea of me wearing a chastity cage. She was very surprised but once again not against it. I explained to her like "I think it's super cute and pure" like I am kinda her "man" and I keep myself locked for her, pure for her, I would never touch anyone else and it is such a deep sign of love. She agreed to try it and from there on out it got a lot more intense fast.

During out next time she teasingly mocked it as I inserted a dildo into her, saying "oh my gosh, it cannot even get hard" and "what if I lose the key on accident? hihi" and I got just so crazy and I went with the flow "but then I cannot penetrate you anymore!" and she was like "awww, but you are not penetrating me anyways at the moment" to which I said "but s o m e b o d y needs to penetrate this super sexy body of yours" to which I could really feel and see that she got more and more wild. "It would be a real shame if this body remains unused" she replied softly and with a sense of hesitation. I grabbed her butt and replied "you absolutely need to be fucked hard" to which her mouth opened wide and we continued teasing each other like that. Not too long later she has a really intense orgasm and starts snuggling against me as she plays lovingly with my cage. My heart racing like a car as I have still not cum and I feel like I have done and said something wrong. She lays there with her eyes open as she gently carasses me, clearly thinking. I ask her what's wrong and she asks "is it bad, what we just talked about? Because I must have sounded like I wanna be fucked by somebody else and I love you and you are absolutely enough for me." Which was very heartwarming and reassuring and I got the feeling it was the right time to talk about it. I felt like this could be the end of our relationship but I had to say it or I dunno what else. "Well, to be honest ... I do kinda want to see you fucked by somebody else." My mouth got dry as her reaction was shocked, appalled and other things.

We had a long long talk after this. A very serious talk. Like why I wanted this, if I am sure about this, would this not ruin our relationship and many other things. In the end we agreed to try it and if something is off for either of the two we would immediately stop it.

Fast forward another few months. Our sex life has slowed down quite a bit, she is busier with trying to find a partner. She tries Tinder and flirts with a few guys (which got me so jealous I wanted to cry and tell her to stop, but I powered through) even masturbates while chatting to one while she thought I was asleep. But alas, she was not really happy with anyone and we were already kinda on our way to just not doing it. We then agreed to try another approach. We would go to a bar, diso, party floor together and try it in person. It could feel better, more natural, less forced. Also she gets to see the person directly from the start.

Enter Ahmad, a Syrian refugee who has been living in Germany for 3 years at that point and was quite decent with the language already. At that point I was 22, my gf 20 and he was 18. We met him at a party night out at a mix of a bar and a disco. Both of us were wearing nice and sexy clothes out, showing cleavage and generally well made up with me additionally waering a flat cock cage. Normally this guy was not quite my gf's type, but she enjoyed the way he approached her and was pretty confident and dominant. He asked her if she wanted a drink thinking I am just a best friend or something. She explained that yeah, she would love a drink, but is it cool that her gf (me) is here? I know she did not do it on purpose and only meant well, but this kinda pushed me aside. Like she had to ask him first if he allows that I am there. This was so hot to me, fudge. He laughed and said it is okay and that he does not mind that we are like this (I think he wanted to assure us because in his culture this is a problem to some). For the next 30 minutes he kinda tried to entertain us both, even bought me a drink aswell, but his main focus was clearly on her. She was still holding my hand, but he really had her attention at that point. Full of jealousy I was close to calling it off, but the horniness outweighed in this situation. After quite some time of getting to know each other, flirting and drinking he asked me "hey, is it okay if I borrow your gf for a dance?" and she turns to me with a big and honest smile and wanting to appear chill I simply said "yeah, of course, have fun with her!"while almost wanting to cry. This is the first time I kinda realized I am really a cuckold at heart.

She took his hand and they went to the dancefloor. We talked about something before: This whole ordeal was to get her a sexual partner that can sexually satisfy her. So, she kinda must make sure first that he has an adequate dick. We agreed that she would try some things to find it out when the time is right. So there I was, watching from the sideline as my girlfriend was dancing with "another man". Closer and closer, his hands on her hips at first, and soon on her ass and her hands on his chest. At about the third song she started to rub her ass against his crotch, then her own hips against his crotch and gently lets her hands slide down there. When he was not looking she looked to me and gave me an enthusiastic "thumbs up" to which I could only gulp as my stomache was knotted up. After a few songs of heavy dancing they came back, both of them clearly happy and him smirking at me. We decided to call it a night and they exchanced phone numbers. On the way home we talked about everything and at home we had the most intense night of love making and teasing up to that day. She came as I asked her over and over if she wants him to fuck her and her agreeing and admitting while moaning and I came even through my cage as she told me that she wants to feel him inside her.

From there on out I had a lot of mixed feelings. Regret, jealousy, but also a lot of horniness. But also a feeling of security because she was extra loving and reassuring. For the next two weeks they chatted and flirted a lot via text. She went to the bathroom several times to take picutres for him and when I asked her about it she teasingly said that it is between the two of them and that I am her pure and loving partner that stays caged for her. Of course, how could I ever say anything against that? Even four years later I have never seen the pictures she took for him.
She told him about me being a transgirl, which surprised him a lot since he thought I was just a regular girl, which actually made me kinda happy. He said that's cool with him as long as we are happy with each other. Eventually she asked him if he would be interested in having sex with her to which he fully agreed, but he was also thoughtful enough of asking if this is okay with me. My gf looked at me and asked for my confirmation, explaining that this is pretty much "a point of no return". I gulped, I fought with my inner jealousy and I confirmed. We took a selfie together to send to him, smiling with the caption "my cuckold wants you to fuck me". He did not know what a cuckold was so we explained it to him. He understood and was actually very delighted by it saying something that him taking the girl of "another man" is really hot. I was hurt at first at the word "man", but it immediately clicked something in me that was just so incredibly hot. I was the failed man here that cannot satisfy his girl. It was crazy hot in that moment. I know he never meant it to be hurtful, his understanding was just not there yet.

So, Friday evening comes, he arrives at our place. She is dressed in super sexy lingerie that she has never worn for me. I am dressed pretty casually actually as I don't want any attention, I was still not even sure if I would not just fully regret this or hate this. She opens the door and they do not lose a lot of time as they immediately start kissing each other, his hands on her somewhat naked ass and my heart burning up as I just awkwardly stand there as I wanted to give him my hand for greeting, quickly retreating. I smile awkwardly as someone else is pushing his tongue deep into my gf's mouth. He grabs her by her asscheeks and carries her into the bedroom, which clearly massively aroused her since I never did that with her especially since I am too physically weak for that. I hesitate and slowly waddle behind them as I enter the bedroom and see her already removing his shirt and kissing his chest. She smiles at me and says "come baby, sit down" as she points to the chair in the corner that we placed there for a good watching experience. All this time I wanted to tell her to stop as I was already rock hard in my thong underneathe my pants and I felt like I could be orgasming just from seeing this. She kisses his chest downwards and goes onto her knees as she smilingly asks him what to do. With a grin on his face he says she knows what to do. Quickly unbuttoning his pants she pulls them down plus boxers and an 8 inch plus cock pops out and slams into her face, making her gasp and proclaim "fuck, such a big cock!" to which he just grins and asks "bigger than this one's?" with a nod towards me and she grins at me and says "so much fucking bigger". At this point I was immensely aroused but also too shy and humiliated to pull out my own thing. I simply started massaging my breasts as I could see a happiness on her face that I don't think I had seen before. She starts kissing his balls, licking the shaft and eventually sucking his cock. Soft moans and grunts filling the room, some dirty talk from his side here and there and an eventual "suck it good, you German whore" which send my mind flying. I had not considered the racial aspect before, but somehow it just killed me in horniness. Also how he just dared to insult my gf and I could not protect her from it. I put my hand inside my pants and rubbed myself through my thong through the remainder of their adventure. I never came, I just edged myself forever. They went on to have sex on our bed, doing different positions, kissing, loving each other. She came three times before he eventually pulled out and came all over her face. They showered together and afterwards we said goodbye and the two of us talked about it until like 4 a.m. before falling asleep. Pretty much agreeing that we want this to continue.

Fast forward about four years, we are still happily together and he is a solid part of our relationship. The two of them have a wonderful relationship of their own and me and him have become actually good friends that also hang together without me girlfriend and for example play videogames. Me and my gf have not had proper sex for over four years now. I am the love of her life and her soulmate and he is her boyfriend and the one that gives her, what I cannot. He has a key to our apartment and we fully trust him. I am pretty much permanently caged at this point and yet I am very sexually satisfied as I also do not feel this pressure to perform anymore or otherwise she might leave me. I am very happy this burden has been taken off of me. Due to long years of hormon treatment my sperm count is very low. Beyond the sexual aspect we also get along very well as a group / team. I often cook for them and also do his laundry while he invites us to take out or even gives me little gifts as signs of apprecciation.

There are at this point quite a few people that know about our threeway relationship. It was never easy to tell anyone and reaction were very mixed. From confusion and a hint of disgust to actual support and understanding. For some people it took a while to open up to the idea but I can gladly say we have not lost anyone in our lives due to the circumstances and the ones we really care about are supporting our relationship. Even so much that for example my gf's sister invites us to a private little get together for christmas and my gf and her boyfriend can just freely kiss and cuddle while I help the sister with the cooking. Or how my mother also invites the three of us to general activities.

Generally speaking I can say girls are way more open and supporting to this when we come out about this than guys. Guys have different reactions. I have a group of male friends that I do regularly play online games with that I introduced to Ahmad. All of us play together now here and then and eventually during a long online chat I confessed to them who Ahmad in my life actually is. They were very shocked and confused but once again accepted it is as long as we are happy. We are still very good friends, but they definitely do treat me with less respect overall and him with more.

For now we hope that things continue to go well. My gf and me want to marry someday and we hope that he will be the best man then. Until then we try to remain a happy couple.

This story was not just meant to be a horny post, I want to encourage and inspire people to go through with the cuckolding. I know that this is often just seen as a fetish, that it is frowned upon, laughed at and even shunned. That us cuckolds are seen as "lesser men". And maybe we are in a lot of ways, but we also love our partners so much that we want to see them happy at all costs. Cuckolding can become something utterly beautiful and healthy for a relationship. Don't be discouraged. I know it takes a lot of courage, but if you do not take the shot then you can only lose.

Thank you so much for reading, I am sorry that it turned out way longer than I wanted it to