[This was a custom request] It's past midnight and your girlfriend and all of her close friends have just returned home from a night out. It's your anniversary today, as of midnight, and you're looking forward to spending a nice day with her tomorrow. However, one of her friends (her best friend!) wanders into your room while your girlfriend and her other mates are just downstairs. She is acting odd but you put it down to the cocktails she's probably been drinking. However, when she starts being mean about your girlfriend you start to realise what's happening. She explains that she thinks your girl is dull... she shows off her skimpy, revealing outfit while telling you how ugly and boring your girlfriend looked tonight. She knows that it's your anniversary and she wants to ruin it. You're not even sure if she even finds you attractive or suddenly just hates your girlfriend but, as she pulls her tits out, you don't really care. She starts to talk filthy to you while showing off her perfect body - telling you that she wants your cum instead of your girlfriend. She's so much better than her in every way and she knows that she'd make you feel better than your girl ever could. She bends over and asks you to lick her asshole while she plays with her already wet pussy. She instructs you that, from now on, you're not to fuck your girlfriend anymore and that every time you masturbate you must think only of her. She lets you taste her pussy from her fingers... she tastes divine. She promises that she'll let this happen more often if you follow her instructions and that, although you're a bit of a loser right now, she'll turn you into a real man by fucking you properly. She knows that your girlfriend is just downstairs as she masturbates furiously while letting insult after insult spill out of her mouth about your long-term girlfriend. She verbally destroys her, admitting how much wetter it's making her pussy. She lets you taste her again from her fingers before she cums hard as you watch. She asks you to go downstairs and kiss your girlfriend with her asshole still on your lips, taking pleasure in the fact that she's made you cheat on your anniversary - despite the fact that she's your girlfriend's best friend. If you do as you're told... she suggests that this could happen again. She's incredible... you're going to follow instructions like a good cheating boyfriend should.