So eager, the both of them!  Even after cumming hard the two manage to pleasure her such that her cock barely softens a little before going back to rigorous attention.  And then comes the screaming, and the roughness in Mina, a warmth spraying into her bowels in a way that Petra knows is her current lover cumming... and cumming... and<em>cumming</em>even as she doesn't slow down!  Damn, the woman was backed the hell up in terms of 'blue balls'!  Her rectum quickly fills to the brim, and because of the tight ring holding it all in it just goes<em>deeper</em>and<em>deeper</em>back up into her intestines... it was such an amazing filling that her cock was throbbing and she was moaning around the face-fucking she was receiving (and expertly given too; the woman had a real talent for self-control).  then of course there was the rough cum-soaked breastplay, always a favorite...<br/><br/>But it seemed Mina was gassed, and her cum dried up (for now).  Furthermore, Tina hadn't cum yet for one reason or another... well, better give her a proper place to do so then!  What better than to have the sister fuck her cum-filled ass and add to the load then?  Patting Tina's ass and forcibly pushing the cock out of her mouth with a lewdly loud slurp, and then sitting up to push Mina back and extricate herself (not a drop spilled, and not a drop of cum left anywhere but the urethra of the stiff cock!) with another equally lewd and loud pop, she quickly turned around, getting on her knees this time, with her ass facing Tina - wiggling tantalizingly - and with her mouth quickly licking the balls of the more 'refined' sister.<br/><br/>"Go ahead and fuck my creampied ass Tina, see if you can fill it with as much spunk as your sister!" she growled out, before sucking on one of Mina's balls hard "Mmm... and spank me you fucking amazon, you better make this twice as good as the pounding you gave my mouth and throat!"<br/><br/>And then she reached out, grabbed Mina's ass for support and leverage, and then shoved the entirety of the cock that had just left her ass into her mouth, cleaning it off with the first couple passes before getting it up and running and ready to blow again (at least, 'twas the plan...)