The first guy my girlfriend was ever with was the biggest cock that she has ever been with. The guy is Colombian yet it is another Latin lover that she has been flirting with for years that I was a little worried about. She told me once that he was harmless and that he had a small cock. She never slept with him and he always chased after her. Some of the public flirting, like on facebook, has really annoyed me but she always told me that nothing was going on. At least nothing was going on until I pushed her into him. The guy has always managed to charm young women, younger than my girlfriend. Well, one night I was with a good looking female friend of mine and my girlfriend said that if I wanted her that I could go and fuck her. I said I only wanted her and she called me a wimp. I responded by telling her that she flirts but never follows through with it. It was a stupid thing to say. She got me back by inviting him out for coffee with us on a weekly basis. Every time that he would arrive she would kiss him on the lips, she'd tell me that it's like that where he's from. When he would leave he'd slide his hand down her backside to her ass and tell her how her lips do things to him. It was annoying but she was with me, not him anyway. After about a month or so of this there was one night where she started talking dirty, asking if I wanted to be naughty. "Of course I do!" I said as she jerked my slowly and kissed me. "Do you ever get jealous of other men?" she asked me. "No" "Really? Not even..him?" "I don't care about him" "He has used these hot lips..." "So what, years ago - he'll never get them again" "What makes you think it was years ago?" "Huh?" "Maybe he used tongue when we saw him today?" "Very funny babe" "Ooh, do you like that?" "Stop messing with me" I told her. "I'm not messing, he did slide his tongue in there. I know you don't like him, but he still gets me a little... wet" "Ahh, this is because I teased yuou about not following through with the flirting." "And how do you feel now?" "Well, you've hardly followed through with a little kiss" "I've been blowing his cock" she said with a wink. "Ha! Prove it! There's no way you'd suck him when you have me" "Oh, his cock is far smaller but its still a nice cock, very suckable. Hmmm. Have you noticed that I tasted funny when you kiss me at the Cafe?" "Thatr's what you eat before, you can't tell me that its cum. Plus he always comes later." "Give me a second, I'll text him if thats what you want". By now she was straddling me and rubbing my cock over her pussy. She sent him a message "Thanks for the donation today My bf enjoyed it" He replied "Any time. I saved up almost all week for that. " "What?" I stammered, coming to some realization that maybe something was actually going on. "You've been..." she said, paused, slid down over part of my cock, "eating his...cum. Mmmmm your big cock tells me that you like this" "This is fucked up" I said. She pulled off and stopped fucking me. "Are you enjoying this? That another man is fucking your girlfriends mouth and then having coffee with you, that YOU pay for?" she said pointing her finger into my chest. I sat there with a weird, confused look on my face. "His cock is super fat, not super long, well, longer than yours, but oh so fucking fat." "What the fuck?" "Oh", looking down at my cock she then says, "looks like this little when is shrinking, maybe I need a real man to fuck me?" "Enough already, you've made your point!" "Have I? Apologize and beg that I don't fuck him" "Look, you know I'm sorry but you've gone too far. I still think that you are probably joking as you are not the type to just go out and fuck someone" "You're right, but after the last 6 weeks I have been sucking his beautiful cock and I have really enjoyed my time with him. You better beg for me not to fuck him, the only other option is that you as me to instead continue to blow him one more time and pay for his coffee and not cause any trouble" "No way am I doing that!" "Well, then I will fuck him. The choice is yours, appologise to me, beg that I blow him one more time with your blessings and your money, or I will become his slut and do whatever he wants. I'll fuck him anywhere, in public, in our bed AND I'll send you proof or do I send it to your female friend?" She started rubbing me, I got hard quick and she was fucking me again. "Please fuck him... I mean SUCK him!" "Freudian slip my darling?" She ground down her hips over me and asked "maybe thats what you really want?" "Mmmmm" I mumbed. "Yes?" with piercing hot eyes and a wicked smile she asked me again. "Yes?" I replied softly, but wasn't quite sure. She began humping down on my cock. "Tell me what you want!" "I want you to fuck him" "His big fat cock?" "Yeah" "Why?" "Uh, its big?" "Why don't I fuck yours instead? "You're fucking me now" "But its not fat enough" she said and my jaw dropped. "He can fill me. Is that what you want? A real man to fill me?" "Maybe" "Oh my god you're pathetic! Another man is using your girlfriend and you are about to cum!" "Its hot" "Maybe I shouldn't fuck you anymore? Its either you are him, who do I fuck?" she asked as she jumped off me again. I stroked my cock and told her she was hot. "Who's got the big fat cock? Him or you?" "He does" "Stroke that cock. Think about his big fat cock inside me. I want you to cum with your hands and beg for him to own my pussy" "Please fuck him!" "Thats it little boy, cum for mommy. This little cock won't do. Mommy needs a big, thick, manly cock". I came all over myself.