"I hadn't actually thought positively about totally destroying a girl's ass." James admitted, brutally fucking Susan's ass with thrusts the full length of his shaft. "Usually being loose is looked down on, but I'm able to go wild and she's taking it, and clamping her ass muscles on my cock."
"Usually what I do is just pull her aside after class, hike up her skirt and take her plug out, stick it to the wall with a sticking charm so she can suck it clean while I just slide my dick up to the balls in her fuck-crazed asshole and let loose." Harry explained, enjoying the sensation of Susan choking helplessly around his shaft as he bulged her throat out with a punishing skullfuck.
In the end they'd gone with Susan's suggestion of a reward and punishment. It was a bright summer's day and they'd ended up on the old playground roundabout that Susan had played with Harry on when they were kids. She was bent over the central bar, her hands bound firmly behind her back, being spitroasted in her stretched bum and her ring-gagged mouth. Periodically she'd find herself spun around, sometimes just to make her dizzier, sometimes to swap holes, sometimes just to play roulette with her ass and throat.
"I can't let you one-up me." James commented as he luxuriated in the tightness of Susan's throat, having spun her round so that Harry could spear into her backdoor. "You know whose ass I'm going to ruin?"
"Mum's?" Harry asked, pounding Susan's ass, feeling the redhead frantically clenching her anal muscles around his prick. "She's such a freaky submissive fuckslut, she would probably love it."
"Maybe." James considered the idea as he wrapped Susan's red hair around his fist, forcing her to swallow him deeper. "I was thinking more Amelia. Her lovely little fuckslut daughter being the pattern for what we're going to do her. What do you think Susie?"
All the bound redhead could do was choke loudly on the throatful of cock she was being fed, her tits bouncing as she was spitroasted by the two Potter men.
"I think she agrees." Harry brought his hand down with a sharp 'crack!' across each of Susan's ass cheeks.
"I've got a certain amount of political influence... between me, Amelia and Sirius we could get Fudge thrown out and make her Minister." mused James as they spun Susan around, sheathing his dick in her bum. "Then at her inauguration just broadcast her being fucked like the big-titted whore you and I know she is."
"All the titles and authority of being Minister, but everyone knows she's just a fucktoy for Potter cock." agreed Harry, gleefully fucking the redhead schoolgirl's mouth as she cleaned her ass off him.
"And best of all, she knows that everyone knows she's just our free use cumdump." James smirked, reaming Amelia's darling little teen anal whore of a daughter.
The spanking, anal fucking and forceful throating Susan was subjected to only added to the arousal from a torrent of twisted and depraved ideas for debauchery that her adoptive family poured forth. Her climax left her squirting her arousal all over the impromptu fucking platform, but still they showed her no mercy.
Railed with a fat cock in her gullet and another buried in her rectum, she could only suck and fuck as best she could until they rewarded her with bukkake double facial cumshots. Still bound, Susan suddenly found herself emptied of the ever-present shafts that had buried in her fuckholes.
The meaty slap of two cocks being smacked on her face left Susan panting with arousal, particularly as they fucked their saliva and ass-coated cocks up and down her face. She mindlessly hung her tongue out so James and Harry could feed her their cocks or their loads - she didn't mind which.
Her reward came in two torrents of thick cum from their throbbing cocks, coating her from forehead to chin with hot spunk. While most of their many long ropes of jizz ended up spurted onto Susan's face as a thick mask, more coated her lips and, through the ring gag, splashed into her mouth. Eagerly, the redheaded cumslut drank every drop of salty cum, slurping it down in long gulps.