Phoebe might be ready, but Piper isn't

Piper was still sputtering weakly as she tried to work the last of her sister's spunk down her throat. The sticky seed burned slightly as it worked down into her stomach, the salty sweet aftertaste lingered on her tongue no matter how many times Piper swallowed.

Phoebe had, for the time being, mercifully gotten from atop het which allowed Piper to roll to her side. In doing so, her towel came off her exposing her breasts.

Luckily for Piper, in the post-orgasm bliss, Phoebe didn't notice and simply massaged the head of her cock. Piper tried to wipe her mouth clean with her forearm, only regretting it once she realized the gooey remnant was now smeared over her skin now too.

On the bed beside her, Phoebe was still basking in the afterglow of her powerful release, a grin on her face, as she rubbed her cock. Piper looked at the slowly deflating member and hoped it would stay down.

Piper sat up on the side of the bed. Her towel slipped the rest of the way off exposing her stomach and and her breasts. As Piper rubbed her sore jaw, she heard the tapping on a phone. She looked over in time to see Phoebe laying the phone down on the disheveled blankets.

"There we go, i've got a copy of the picture for my own archives in my cloud and my email," she chimed before standing up to stretch, casting her gaze onto her sister on the bed. "Nice tits, sis."

"Ugh... fine... whatever, am I done now?" Piper replied, a mix of embarrassment and repressed anger in her voice.

"Done?" came Phoebe's slightly puzzled reply. "Oh, sweetie, that was just the pre-show. Does This monster look like a few pumps chump to you?"

Phoebe playfully slapped her flaccid cock making it bounce, "I've already cum three times today and plan on unloading a lot more. I expect you'll be receiving at least two more loads."

"What?!" Piper replied, turning to face her just in time to see that Phoebe was undressing completely, pulling her shirt over her head and casting aside while stepping out of her already undone jean shorts. Looking at her sister completely nude, Piper felt her pussy moisten. She wasn't sure if it was by her tits or her quickly engorging dick.

"You said if I gave you a... a blow job this would be over!" Piper stammered out.

"Mmhmm, but it isn't. Those tits of yours are too tasty to pass up. Now I wanna fuck so off with your towel," said Phoebe stroking her dick to make sure it was ready to pound her big sister.

Phoebe's smirk was broad enough to cover a barn. Piper knew she was in no position to bargain and, even if this was ****, she couldn't deny that somewhere in the pit of her gut... She actually wanted this. Something about the Phoebe's forward nature was triggering something in her she never knew was there. She'd never admit it, but Piper enjoyed having Phoebe fuck her mouth. New feelings were popping up inside her.

Piper, seeing no way out of the situation, and fighting with her own repressed desires, she found herself removing her towel from around her waist at her sister's command.

"Hee, you take orders really well? I'm gonna fuck the shit out of you," Phoebe teased as she watched Piper stand letting the towel fall off of her. "Too bad you're so SLOW about it!"

With a sudden shove Phoebe pushed Piper back to the bed. As She tumbled back onto the mattress Phoebe wasted even less time in rolling her older sister over onto her stomach. The sides of her breasts pressed out along the sides of her body. Phoebe gave her bare ass a playful little smack. "Nice tan lines."

"Ooof! Haven't you heard of going easy?! You've already got me, " Piper grunted from the sting of her palm against her lily white cheeks.

"Nope!" she replied cheerfully as she climbed onto the bed behind Piper. "And I don't plan to start now. Now less lip, Raise those hips! Where do you want it?"

Glancing over her shoulder, Piper saw her stroking her left hand along her shaft, still slick with spit and cum. Was she really about to go through with this and let her sister turned shemale fuck her?