Have her call Adam.

You don't say anything in response, just grab her around the waist and spin her until she is under you, her face pressed into the couch. Her hips instinctively arch back to meet your thrust as you bury yourself all the way inside of her. Her pussy clutches down around your cock and she cums without you suggesting anything to her this time.

Hmm... guess she likes being manhandled.

Your cock withdraws to the head and you slam back into her over and over again, "Je-Jesus, JoOOOHn," Cassie moans, her sentences staggering around the pleasure she feels building back up insider her, "I've never been fu-FUCK THAT'S GOOD!" her breathing picks up a bit as the walls of her pussy start to quiver again, "I've never been fucked like this by..." Cassie's mouth clamps shut as she realizes what she is about to say. Her cheeks fill with redness and she gets quiet. The only sounds are her muffled moans.

You raise an eyebrow at that, and the thought of what she was going to say about your friend makes your cock twitch. You feel horrible about the thoughts you're having but... God it's hot to think about. You're hands grasp her hips and with your next thrust you shove her whole body to the couch so that she lays flat on her stomach, you dick thrusting in and out of her as your legs straddler hers tight together. The sudden sensation sets her off again on a slightly smaller orgasm than the last. You lean over and whisper a question into her ear, "You said you weren't used to a dick this size? Why not, doesn't Adam compare?"

"Oh no, not even close," she says without thinking, then she puts her hand over her mouth. Whether in embarrassment or to stifle a moan you can't tell, probably both.

"And he doesn't fuck you this good? Wow, that's very generous of him."

Cassie looks at you confused over her shoulder, "What-_oh god, faster please faster-_John, wh-what do you mean?"

You smile and comply with her request, "Well Cass, didn't you think it strange Adam wasn't too upset by you enjoying yourself so much? Even if we are friends, you were putting on quite the show, the poor guy," The brunette begins to look concerned and maybe a little ashamed until you quickly sad, "Geez, you're cumming pretty hard right now," true to your word, Cassie buries her head in the couch cushion and lets out a muffled scream and her whole body convulses. You pick up the pace to make it last a longer, "Adam asked me to come onto you know. I was confused, but it seems he just wanted you to have something he couldn't give you. You really ought to thank him."

Coming down she says a little louder than normal, "I will, oh God, I will!" You look around and see her cellphone nearby.

Picking it up you drop it next to her face, "Okay then, go ahead," Cassie's arm struggles to get out from under her and you realize you will have to get off her until she's dialed. You withdraw from the brunette and she unlocks and dials Adam on her phone. She doesn't put it on speaker phone, but at your prompting she turns the volume up to the point you can hear the other side of the conversation. After a few rings Adam picks up.

"Hello?" his voice sounds a little sullen, like he's not quite okay with what happened this morning.

"Hey baby! You at work yet?"

"Yeah, you and John finished yet?" There was definitely an edge of annoyance in his voice.

"Well, John hasn't finished as much as I have but-" You interrupt her by placing your cock between her tits and pressing them together. As you begin to tit fuck her you tease her nipples, informing Cassie how sensitive they are to her right now, "Hmmm, that's nice. Well guess we're not quite done. I just wanted to call and thank you for setting up this morning."

"What?"

"Don't be so coy honey, John told me all about it," Adam continues to act confused so Cassie explains, "Look, I know you wanted me to have sex like you couldn't give me. I've always had orgasms with you," you prompt her to be completely honest, "Well... I had orgasms most times... But JOHN, oh god John just doesn't stop and I've never felt anything so intense in my life."

"Cass... Never? Not even with me?"

You withdraw from her tits and push her back on the couch lining up your cock head with her tight cunt, "Tell him why," you say, "And I'll bury myself up to the hilt. You'll have an orgasm that will leave you shaking for hours."

Her eyes widen in excitement, "Yes, sweetie even with you. John is just so much bigger, last so much longer and-" You press yourself into her completely and her orgasm starts, "OH SHIT, oh God, John don't stop. Adam, John came just before you left and he's _still _hard, _still _fucking me. Fucking me right now and-oh god don't stop fucking me John-and Adam it's so good, I'm c-cumming right now!"

On the other end of the line Adam is sputtering, obviously hurt by the words you're hearing. You continue to fuck Cassie's quivering body as she describes to Adam what she's feeling, that your dick reaches places he's never touched. By the time you are ready to blow she's barely saying anything coherent, just moans and shrieks and the occasional "So big," or "So much better," at this point she's begging you to keep fucking her more than she's talking to Adam. You withdraw from her, giving your cock a few strokes before it erupts. At your will you just keep cumming, longer than any natural cumshot would last. Thick ropes of your semen rain down on Cassie as she keeps twitching and shaking from the orgasm, "Oh he's cumming all over my tits and face babe. You're right, this is so hot. I should have let you cum on me before. Not sure why I was so against it, John just makes it seem so sexy."

You didn't even need to prompt that one. Finally spent you let your cock go limp and take the phone from Cassie, "Hey, I know you're a little hurt Adam, but we're best friends and you asked for this last night, remember?"

"Yeah... I guess..."

"Besides that's the hottest thing that's ever happened to you. You're probably super hard right now despite yourself. You're not going to break up with Cassie over this and you're not going to end our friendship either." He grunts his affirmation like he's having a hard time concentrating. You idly have Cassie clean your dick with her mouth while you finish your conversation, "Alright, we got to go. Going to be a busy day for us, Cass may invite over a few friends," you hang up before he can respond. Next you call up Cassie's boss, explaining that she's too busy fucking you today to come to work and that she should get the day off. While you're at it you get her a 50% raise, because why not reward her?

You look down at Cassie licking and cleaning your cock, still covered in your cum from head to waist, "So Cassie, what do you want to do next?"