Or to try something new

"Uhnnn, n-no...!" Rachel gasps again when you try another few thrusts into her quivering snatch, making you slowly pull back with a puzzled look to your face. Then finally you're starting to understand, when she's again grabbing tight onto her blonde friend's buttocks, and practically dig into them with her nails to spread the crevice between them wide.

"Oh, really...?" You ask her, with a look of concern on your face, as you're really not sure it's such a good idea. But then Kate looks back at you as well, her face still blushing deep red from both exertion and excitement, but with a smile and a gleam in her eyes that's leaving no doubt to her concession.

"Well, fine then..." You give them a quick laugh, and then start looking around for that tube of lubrication. Upon finding it you apply a generous amount to the wide-spread cleft, and then listen to Katie's soft moaning while you gently set to work your fingers around her sensitive little asshole. "If you're really sure about this...?"

"O-ooh, yes...!" She nods vigorously right back at you, while still moaning and gasping with delight, and then tense up when you slowly start pushing inside of her. With Rachel already firmly lodged inside her pussy she's even tighter than you'd ever expected, but you try not to say anything while you painstakingly start working on both widening and making her more relaxed.

Then you realize you can actually feel Rachel's hardness through the thin membrane separating the two openings, and you find some amusement in listening to her increasing moans while you 'unitentionally' keep nudging her as well... Finally you've got the tight blonde about as ready as you think she can get, and you apply some of the lubricant to your fat cock, before emptying the last of it directly into the girl's widened little hole.

"Uhmmm...!" Katie moans at the sensation of the liquid dribbling inside of her, seeming to think you're just about to give her a last good greasing with your fingers, and then gasps out loud when you squeeze the full head of your shaft through the puckered ring of her sphincter. It seems like your timing and amount of pressure is good though, as you're now firmly lodged just inside of her tight little hole, and can allow her a moment to adjust before you push in deeper. "O-oooh, f-fuck...!!"

"Oh, yeah...!" Both you and Rachel echoes the other girl's guttural groans, and again you notice how you can truly feel your lover on the other side of that thin membrane. Within moments the two of you are pushing together even further inside, until you're both lodged firmly to the hilts in your respective tunnels. And then you stop for a moment to catch your breaths, while leaving Kate to try and cope with being so completely imapaled by your shafts.

"Y-you ready...?" Rachel eventually smiles up at you, after a few moments of rest, though you guess the question would be more justified unto the girl that you share. You're not one to hesitate right now however, as you again feel that need to move - or you feel like having your cock ripped off at the base by the incredible tightness of that sphincter, - and you slowly withdraw together until you're almost all the way out again.

You manage to repeat this act of being in perfect sync with eachother a few more times, moving as one in slow deep strokes, but then eventually slip apart and try and finding your own rhythm that still matches well wih the other's. And thus you can start picking up the pace as well, with you taking the lead of your concerted efforts, as you can easier guide Kate into meeting with Rachel's more restricted thrusting.

Despite her slender frame it seems like Kate is rather quick to attune herself to this dual action, and soon she's practically squealing in delight - even at the height of your enthusiasm, when you're actually pounding her about as hard as you thought you'd dare go on her pussy...

"Uhnn, fuck!" You grunt as you finally can't hold it anymore, burying yourself deep with one last thrust, and feel Rachel doubling her efforts to keep up. Thanks to that you get off at almost the exact same time, filling 'poor' Kate to the brim with your heavy loads, though you don't understand right then that she too was able to reach her peak just in time.

It's not until you've slowly pulled out of her, and she rolls over into the couch in complete exhaustion, that you notice all the mess she's made all over Rachel's already sweat-covered body...

"I... think I need a shower!" She giggles up at you, though she's needing some help to get herself out of the couch, and then looks down to her waist and full breasts - now literally dripping with layers of bodily fluids. "And I guess so do you...?"

"Well, yeah..." You agree, and the join in with her laughing - even as you're both still out of your breath. It looks like you won't get Katie to join you just yet however, and so you leave her fast asleep under the cover of her own top and your shirt, to let them soak up a bit of the sweat and traces of semen leaking from various parts of her body...