My girlfriend is 23 years old and we have been together for over five years now (I'm 25). Last year we got engaged and next spring we will get married. So far I have been the only one she had sex with (after one week of dating her - she was a horny 18 year old back then and had trouble holding back even one week). She is very shy, but gorgeous as hell and knows exactly what effect she has on the males around her.
I often imagine her being seen nude by other men and have tried to stage it, but had no success so far (she is suspicious and clever enough). During sex I also phantasize about other guys fucking her regularly. It goes so far, that I can not even watch porn anymore, without picturing her in the scene. Especially when it comes to situations regarding accidental nudity, swinging or sex in public.
I have a couple of recurring phantasies. One goes as follows:
Her younger sister (18) just got a new boyfriend (around the same age) who is still a virgin. He is over at our apartment to play some videogames with me. My girlfriend is sitting on the couch with us, wearing a very revealing top. Then I notice that the boy is trying to catch a glimpse of her firm c-cups. So I take my gf into the kitchen with me to 'prepare some snacks'. There I tell her what I noticed and ask her, if she would like to give the young man a nice present. You know, in order to welcome him to the family. She reluctantly agrees and lets me take off her bra, still wearing the top. Once we return to the living room she starts leaning forward more often than necessary to make sure he gets a nice view. After a couple of minutes we both notice the bump in his pants, confront him with it and have a great laugh about the situation.
Then I take it one step beyond: I ask him if he would like to see more. She looks shocked and embarrassed, but I don't give her any time to react, pulling up her top, completely exposing her boobs to this inexperienced boy. She tries to cover up, but I convince her that he has seen her now anyway so why not let him touch. It surely would be great practice for him and she would do her sister a favor that way. It takes some convincing but in the end she agrees and I can sit there and watch his shaking hands reaching out to touch a women's breast for the very first time. And no other than my gf's, wich makes it even more exciting!
My cock is rock hard by now and I can tell that she enjoys the attention just as much. So it is very easy to go one step further, undress her completely and start fucking her. All the while the young guys greedy eyes race all over her body. Finally I offer him to join us and watch him fuck my soon to be wife.
Recently I have told her about my phantasies and that I would like to share her with another man. She did not seem too eager about it and said that she wants no one but me, but in the end she had to admit that she likes the thought of it, as long as it stays a phantasy. Nevertheless I am confident: I have planted the idea in her mind that I am open for it, so now I just have to wait for the right guy to join us and then harvest my reward
This is my first post here, so please let me know, if you like or even share my phantasy. I have a couple more and even two of hers that fit in here quite nice.