First, heat things up.

"Hey Ron," you call out, "how're you liking your new girl?"

Ron pulls back from the kiss and says, "This fucking sucks!" Taylor kisses his neck and rubs his crotch as he says this, but he looks disgusted by the chubby girl in his arms.

"Well, you should enjoy it! I mean, you don't have to love her, or even like her, but please get more turned on by her bitchy attitude than you ever were by Jess." You have to hide your real expression to keep from spoiling the game.

Ron looks back at Taylor. She smirks at him in a way that shows she knows she's in charge. There's still a look of disgust in his eyes, but there's something else there, something primal. "Oh my god, you're so fucking hot! I hate you, but you're the hottest thing I've ever seen!" He kisses her much more intensely than before, way more passionately than he ever kissed Jess in front of you.

"Yo, Jess!" you say, "you having fun in there?"

She keeps licking Taylor's asshole as she flips you the bird.

You laugh, then say, "Jess, please get turned on by being humiliated. Like, please don't start thinking of this as a good thing, but please get super horny from people humiliating you, especially sexually."

Jess pulls back and takes a deep breath, almost in shock at the new emotions running through her.

Taylor notices that her ass isn't being serviced and twists around to look behind her. "Hey, I didn't say you could stop, you dumb whore! Get back to work on my ass!"

Jess still looks disgusted, but all the fight goes out of her as waves of lust sweep through her body. She looks up at Taylor and whispers, "Yes, Princess Taylor!" before shoving her face between Taylor's flabby cheeks and enthusiastically getting back to work.

"And fucking strip, already!" yells Taylor. "You look like an idiot fully clothed with your tongue up someone's ass!"

Jess pulls back and hastily tears off her clothes. You're actually seeing your friend's girlfriend... well, ex-girlfriend... naked! She's pretty slim, but actually has really nice breasts. They'd obviously seemed pretty good through her shirts, but as she takes off her bra, you can see that they're definitely handfuls. As soon as she's naked, she gets back on her knees and goes back to work worshiping Taylor's asshole.

That just leaves one person to adjust. "Okay, Taylor. I don't want you to understand exactly how, but I do want you to know that I'm somehow responsible for you being treated so well, and I deserve to be a part of it. Please?"

Taylor breaks her kiss with Ron, but he keeps kissing her neck and sliding his hands all over her plump body. She unbuttons her top, then pulls it off. You see that her body is surprisingly nice. Sure, she's short and plump, but her waist is proportionally small, making for a nice hourglass shape. Plus, her breasts are a lot bigger than Jess's! Despite their size, they don't even sag after she pulls off her bra. Ron pulls back to look at them, completely disgusted with himself by how turned on he is. Taylor grabs his head and shoves it between her big breasts. He responds by wildly rolling his head around between them.

Taylor laughs, strokes his hair, then turns to you and says, "So, you gonna join us or what?"