Our crazy black experience SeXStoRY

So my girlfriend and I have been together for about 4 years.. we are both currently in college, have a great sex life and always have. I know she is loyal to me but i know she is human and attracted to other guys like i am with other girls. My best friend is good looking and was always the popular guy in school, they always playful flirted and i actually kinda liked it. Our first year of college he came to visit me where we went to school and ended up going out and getting really wasted. My girlfriend and i had been together a year at this point and she ended up coming back to my dorm with me and my friend. He stayed on the floor while we were in my tiny bed and eventually me and my girl started having sex.. after about five minutes i switched positions to where i could look on the floor and saw him jerking off.. i was wasted and sober i never would have, but i told him to come up and join us.. He was even more d***k than me and just looked at my girlfriend with this smile on his face.. She instantly threw him on the bed and started sucking on him.. he was huggeeee and we were friends long enough, i knew this. I could hear her gagging just trying to get it in her mouth and it was really turning me on like never before.. i went behind her and started tasting her.. after about five minutes i hear his voice say "turn around" as he stares directly at her.. she curiously looks at me with a look almost asking for permission.. i just nod and tell her to bend over.. he gives me a high five and says i love you man.. then proceeds to give my girlfriend the best sex she's ever had while im standing there watching.. it was humiliating, but thrilling... she loved it. Anyways, that was the first experience.. 3 years later, she is currently working at Hooters.. she would always come over after and tell me about all the guys that would hit on her and to be honest i kind of liked it. But after a while she kept mentioning this one guy named Keith, more than other guys.. and i started to notice but never really said anything.. a few weeks go by and i go to her purse to look for her pocket knife i look in a side pocket and find a receipt with the name Keith and a phone number.. i then confronted her and she said she never talked to him and only kept it because he was attractive and me and her had been fighting a lot lately.. i was in a crazy kind of mood and just told her to text him and she didnt even want to be i insisted.. i said i just wanted to see what he would say. She never mentioned to him she had a boyfriend and after about 10 messages of finding out that he was 40, divorced, had 3 k**s, and that hes a personal trainer he said to her i need to show you something.. I was watching the whole time. He then replied with "daddy cant stop thinking about you" and a picture of a huge.. black man built completely of muscle.. with a pornstar penis. Both of our jaws kind of dropped and i said "is that him"?!? She just replied with a silent and whimpering "yes it is".. i was almost intimidated and humiliated instantly after seeing what this guy looked like but it gave me that incredible feeling like back with my friend. I asked her if she wanted him and she said no, but i knew it was to not hurt my feelings.. after i little talking and me asking her "what if i wanted you to", she responded by saying how she kind of missed our previous experience as much as me and wanted to. I told her to respond and tell him what the deal was, that she had a boyfriend and it would just be sex.. and i would be there. He seemed even more excited after that which comforted me. The next night he comes over... this guy is absolutely massive.. and very good looking. We invite him in and i hand everyone a beer.. he then says that he doesnt drink and he's here strictly for business.. he then gives her that same grin that my friend did years before and then aggresively grabbed her ass and said that it was even juicer than he had been thinking about. He then asked her if her man (me) "knows how to fuck a beautiful little girl like you".. she responded by saying yes and that she loves me.. then he looked at me and told me to drop my pants at the same time as him.. we did and it was embarassing. He then looked at her and asked her which one she wanted. She didnt even look at me for approval this time.. she dropped straight to her knees and started licking up and down and his huge limp shaft.. already moaning and getting excited. He was just standing there laughing and told me i trained a good little girl and said a sly "thanks b*o" and then winked at me.. he was trying to embarass me and inside i liked it.. i didnt know why. The whole time i hear here gagging like crazy and choking trying to take him in her mouth while he's agressively grabbing the back of her head forcing it. She sounded like she couldnt breathe and her eyes were watering down her face.. i asked her if she was ok and he said "dont talk".. she then kept her mouth around him while bringing both arms up and giving me thumbs up. He then started laughing again and started being more aggressive. She had slobber going everywhere and i was almost shocked to see her in a way that i had never seen.. its like my girlfriend was in a porno. He then says "get on the bed white girl" and she eagerly plops on her back with her legs dangling.. he walks over to her.. drops on his knees.. grabs her feet and completely spends her around so that her head is now backwards facing him. then smiling looking at her he says "open wide baby".. her mouth springs open and he lunges his huge cock straight down her throat and she makes a sound that ive never even heard before and pulls aways because it gagged her so bad.. laughing he says "ok ok ill play nice, now open wide again" she looks at me this time and as he slides in her slowly shes just staring at me.. i love it.. her eyes are watering and i look at her with concern and she gives me two thumbs up again.. he then looks at me and laughs.. again. After a while he orders her to get her white ass up on the bed and put her face down in the pillows. He aggressively tastes her from behind in every watch way.. telling her and i how good it tastes and how shes gonna love whats coming next.. shes moaning so hard im worried the neighbors are gonna hear. Then he lifts up and kneels behind her while her body is already shaking.. he slowly slaps his dick on her tight butt cheeks, and it literally covers the whole surface.. he slides up and down the outside of her lips and then i hear her go "oh my fucking god!!!" he conceitedly says yeah baby... chocolate. I stand there watching him pound away at her and her body looking like she wants to stop but her voice is saying anything but. Hes slapping her ass.. pulling her hair. Doing all these things i never do and she just looks like she is having the time of her life. After about 10 minutes of aggressive doggy she screams "i wanna ride that black dick right now".. she pulls away and his eyes get huge.. he looks at me and smirks and says "yes ma'am" and laughs while she throws him down and climbs on top.. She really screams this time when she puts it back in and im impressed with how well she takes it. She was just bouncing up and down.. looking at me.. looking at him.. having multiple orgasms. He proceeded to have his way with her.. tasting her repeatedly, making her taste herself off of him.. loving the moment.. while i stood there and watched.. completely silent. He came inside of her and asked if she was on birth control.. she is and he said "ok well i brought a plan B just in case.. i always cum in my sluts".. then smacks her ass and says "hop off daddys dick baby i gotta get something to eat".. he then gets dressed silently as im still kind of standing there in shock.. hes huge and i didnt know what to say. As soon as his shoes are on he walks by me.. smacks MY ass, and said its been pleasure, and then leaves. Shes laying on the bed stairing at the ceiling, almost looking in pain. i said "well that was fun" and she rolls over, looks at me and says "thank you so much baby.. and by the way, im not going to be able to have sex for a few days" with a sideways face and i then walk closer to the bed and look between her legs.. what was once my girlfriends beautiful, tight, 22 year old pussy is now completelyy stretched to the size of a beer can and is completely beat red.