Your girlfriend confesses to you that the new life drawing model in her studio arts class is absolutely gorgeous. You can sense in her voice that there is some desire there, something more than she's willing to admit outright. There's a lust in her voice, a longing, and beyond believing that she's hiding something, this desire turns you on. You hate to admit it, never thought it would be true of you, but you push her to keep talking about him. His body. His muscles. His ass. Even his cock. You're getting hard hearing her talk about how he was so hot, she had to go masturbate after the first class. And she even had a sex dream about him! There's no hiding your reaction now, your cock popping a massive tent in your pants. Even she can see it. "He's much bigger than you," she admits, and you can't help but groan, imaging your girlfriend lusting over a big huge black cock. She smirks. "You know what else?" she says, as you begin to stroke yourself through your pants, "I gave him my number." You can't believe how hot this is, hearing her talk about getting coffee, going home with him...and hooking up. Your cock is out and your girlfriend is touching herself as she details all the things she did with him, all the things she did with him that she doesn't do with you. She's not being mean, just honest, but it's turning you on all the same. She tells you that you're going to help, too. Help her get fucked. She kisses you, saying that she just sucked him off and you can taste him on her lips...and you burst. You cum before you even realize what's happening, but your cock stays rock hard as your girlfriend explains all the ways you'll help her new, hung boyfriend fuck her! Getting her pussy wet, kissing her as she gets fucked...cleaning his cock off after he fucks her! You can't believe how hard this is making you, how desperately you want it, and how encouraging and sweet she's being. She even gets a huge black dildo, the one she bought to try and approximate her new lover, and fucks her pussy so you can see how much he stretches her open.